PDF malware analysis — malicious · 1adb445fb706352b

MALICIOUS

PDF

82.0 KB Created: 2021-09-11 11:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 75a44d708f66221afc1d137dc750cf96 SHA-1: f8f8511266b57e73eb042812d73b2ba8c2b21b22 SHA-256: 1adb445fb706352b0886a7f2df4af2b554b45af8b03eaaacc38b24a49a17e4b0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple external URLs, many of which are hosted on compromised websites or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports the phishing lure attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9373

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 https://drafthe.ru/uplcv?utm_term=android+for+32+bit+pc PDF link annotation
- https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/8141360085.pdfIn PDF document text
- http://status.cz/UserFiles/File/xinasatojikoxakevopojomuw.pdfIn PDF document text
- https://broadcasthub.com/ci/userfiles/files/4969398562.pdfIn PDF document text
- https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/6f4812957cf5ed9c8f79d56f5f062b2f/37166765577.pdfIn PDF document text
- http://lubrifianti-auto.ro/files/file/26252606940.pdfIn PDF document text
- https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/82018853724.pdfIn PDF document text
- http://hoteldazegliotorino.com/userfiles/files/sutozozuno.pdfIn PDF document text
- http://ptairsupply.com/userfiles/file/48717844562.pdfIn PDF document text
- http://marcelponjee.nl/ponjeefiles/file/gixopo.pdfIn PDF document text
- http://vinhthuan.com/upload/files/60796537191.pdfIn PDF document text
- https://yaofangpeixun.com/upload/files/64086715640.pdfIn PDF document text
- http://artechq8.com/beta/uploads/files/wazazafatatevivalefaxi.pdfIn PDF document text
- http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161306abbed2c5---13599569993.pdfIn PDF document text
- http://evpltravel.com/xv_image/file/gakevaxupusorug.pdfIn PDF document text
- https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f50f9212a---3849428754.pdfIn PDF document text
- http://konferencii.org/web/uploads/assets/file/sodude.pdfIn PDF document text
- https://rallstarawards.us/nbloom/fckuploads/file/waxurikoduzelenevugarumal.pdfIn PDF document text
- http://fszhenjia.com/upfolder/e/files/20210907013019.pdfIn PDF document text
- https://bandotrading.it/uploads/file/50947412925.pdfIn PDF document text
- http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132bc774088c---gonev.pdfIn PDF document text
- https://learnrkb.jugalbandiresearch.com/ckfinder/userfiles/files/savadiwabipabozisobirus.pdfIn PDF document text
- http://pro.ovh.net/~tribuene/images/banque/file/6698388731.pdfIn 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_off0000e5f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5F9	10516 bytes
SHA-256: `829de4e8dc617ef8cd6f7a3ba3215e680cec40c1365a729f73ee9774cfc9e8ea`
`font_01_sfnt_off0000fddb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDDB	17568 bytes
SHA-256: `c7b1d31e7bc8a9fef61aec34c1c75a44e3851caadcd4ceea5dce5a1fd868405c`
`font_02_sfnt_off00012ae3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12AE3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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