PDF malware analysis — malicious · bc7d89c95716f89f

MALICIOUS

PDF

88.3 KB Created: 2021-06-29 21:49:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 343b3406bec01d50b26dc7bba406a30e SHA-1: 24612ae3ecb2d522c18fb764937072fcf021fa19 SHA-256: bc7d89c95716f89f019dc3633e4e19212448e2def22d7c6545b1a0e38b5b6e4a

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The heuristics reveal it functions as a link farm, directing users to compromised CMS upload storage, likely to download a password-protected archive. The embedded URLs and the nature of the link farm suggest an attempt to trick users into downloading malware disguised as legitimate files, possibly using a password provided in a separate communication.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d439721887---misif.pdf In PDF document text
- http://sendedianqi.com/upload_fck/file/2021-6-27/20210627053613462330.pdfIn PDF document text
- https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/2ddc38fcbc4aec3dac8ef9b87558f8ab/49007820846.pdfIn PDF document text
- https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c23e2bdab---susanuzemizon.pdfIn PDF document text
- https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/30a2afd77a7a1fe4031f3a652cfcf18a/80434460204.pdfIn PDF document text
- http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081787cdf30b---wolefokexabarufazera.pdfIn PDF document text
- http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fec589437---21478444852.pdfIn PDF document text
- https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911d0a4ccae---tutevabo.pdfIn PDF document text
- https://angkortaxiservice.com/userfiles/file/boxenura.pdfIn PDF document text
- https://muratay.nl/userfiles/file/nafomadano.pdfIn PDF document text
- https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/d708a75367ee9e8a83b7724254f917ef/wanujesajube.pdfIn PDF document text
- https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/62e035bde2881a8ccef14a914a00257e/25302290547.pdfIn PDF document text
- http://alexanderkanevskyartgallery.com/clientMedia/file/27474708027.pdfIn PDF document text
- https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/9d5ccc1de33482ceba9350d97f5c7fad/pusawumunibeduposuko.pdfIn PDF document text
- http://permanentnimakeup-brno.cz/userfiles/files/movopup.pdfIn PDF document text
- http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160892ab1514ea---56268666594.pdfIn PDF document text
- http://tuzvedo.hu/elemek/file/52779788160.pdfIn PDF document text
- https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/7ovmn6tgb86112786gjppjem64/wadeluzu.pdfIn PDF document text
- http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf16d65c0c0---tubexodozobo.pdfIn PDF document text
- http://agataklimowska.pl/userfiles/file/kafobojuwitofaxu.pdfIn PDF document text
- https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/824b7c5331770584de1ba8beaba492f6/venodosevawoxezokadujude.pdfIn PDF document text
- https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609298fd4e399---kalerogilatutixox.pdfIn PDF document text
- http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a330cde3e4b---wovuwuvalefaratogitorameb.pdfIn PDF document text
- https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/10361f3e2f3f7749d34c5b17590d7077/sedejasalenibadilefatag.pdfIn PDF document text
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef44bbb4e7---83932158997.pdfIn PDF document text
- https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/c4993c043029d7f8f90c61aead05eb10/85014595046.pdfIn PDF document text
- http://writtenmail.com/upload_images/file/koriduxulojejida.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=file+viewer+plus+activation+key+freePDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f372.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF372	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010b89.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B89	10908 bytes
SHA-256: `83f992214e4ab2f3ec1158454b07a183e8fad5cda82fceed4925b4c27cdd417d`
`font_02_sfnt_off00012500.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12500	17160 bytes
SHA-256: `e386cce2f94bd908768ae783bc89f5a8f20b3a06559328bc1983221ae669b905`

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