PDF malware analysis — malicious · d88dc015c825051d

MALICIOUS

PDF

73.2 KB Created: 2021-09-05 23:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: e14d399d0eb363b890e97ebb23a113bb SHA-1: f0b26828eae918579ec7b9931287cc9c7cc1f3e0 SHA-256: d88dc015c825051d030abac4a01028da8464603b879597b6d81f4dcdcc238353

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal the PDF contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs are designed to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9982

Heuristics 6

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607addc4893c9---53149460699.pdf In PDF document text
- http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6486dcb6d1---25179559029.pdfIn PDF document text
- https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/be3748823291626332b759f844a30b2f/kasafoxukenema.pdfIn PDF document text
- http://nutronicltd.com/userfiles/file/mejadezotesatikubaz.pdfIn PDF document text
- http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/5524524511.pdfIn PDF document text
- http://autoset66.ru/admin/ckfinder/userfiles/files/gibojefefu.pdfIn PDF document text
- http://szyuangang.com/UserFiles/file///63021143479.pdfIn PDF document text
- https://rajakeempat.com/contents//files/52481490884.pdfIn PDF document text
- http://majedalkarkhi.com/pics/file/58810378850.pdfIn PDF document text
- http://agnieszkapawlik.com/userfiles/file/suzumonigegoban.pdfIn PDF document text
- http://pileshoppen.dk/userfiles/file/16249794435.pdfIn PDF document text
- http://nitexprofi.cz/userfiles/file/20524819852.pdfIn PDF document text
- http://apluskleaning.com/admin/images/file/21874813449.pdfIn PDF document text
- http://pinxedien.net/upload/files/sanalozasivofawimep.pdfIn PDF document text
- http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/go1htv6u48ap5akaii7evojsp7/41965163306.pdfIn PDF document text
- https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079842028ff6---nofidavezi.pdfIn PDF document text
- http://elskenecologie.nl/files/bobusimivo.pdfIn PDF document text
- https://bcm.es/files/galeria/files/wizipugoxivupazaja.pdfIn PDF document text
- http://tablica-nieruchomosci.pl/uploades/fckeditorfile/5719225902.pdfIn PDF document text
- http://etabetasurvey.com/userfiles/files/87473090119.pdfIn PDF document text
- http://inruho.ru/ckfinder/userfiles/files/gibupofojuwijatakekebizax.pdfIn PDF document text
- https://estudiowebcolombia.com/ckfinder/userfiles/files/94473987977.pdfIn PDF document text
- http://ca1970.com/clients/10044/File/zutowebimejexomivu.pdfIn PDF document text
- http://innotec-industrie.be/userfiles/file/redabowutifimigon.pdfIn PDF document text
- http://efuturesthai.com/uploads/files/44999837206.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=kalaikathir+today+news+paper+pdfPDF 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_off0000b770.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB770	10876 bytes
SHA-256: `e9860336d78d23624fdcce1335b774c9972f5cccd2849640f150218ae46c40d6`
`font_01_sfnt_off0000d093.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD093	18288 bytes
SHA-256: `358516e3f0039138266b3ea5314ffadf703694010144189f75277ce9b6cb743d`
`font_02_sfnt_off0000fef4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEF4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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