PDF malware analysis — malicious · 37f2d8ac894be9af

MALICIOUS

PDF

77.1 KB Created: 2021-03-31 11:41:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: e7d08c13a22da3e296176ea163a084ef SHA-1: 2afee08fdca3ff8ac67322e4734176d01ab66202 SHA-256: 37f2d8ac894be9afe301170f405730a4b223d6613b263233aba0a1af667d690b

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file exhibits characteristics of a link farm designed for SEO manipulation, containing numerous external links to potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs and the PDF's structure suggest it's part of a campaign to redirect users to harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://dugedepap.ru/wix?keyword=madden+17+digital+code+xbox+one PDF link annotation
- http://esclub.info/74299325011kxqop.pdfIn PDF document text
- https://cdn.sqhk.co/kigimijexap/ugcjaha/koala_chlamydia_rate.pdfIn PDF document text
- http://rebomiken.iblogger.org/fiwuforudesarolezosab.pdfIn PDF document text
- https://nesotufofiwin.weebly.com/uploads/1/3/1/3/131381712/puzukoponomif_susezafijogad_gogifekunan.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4458122/normal_601a06625bfc8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368781/normal_60241bf6e703e.pdfIn PDF document text
- https://wegakerovosa.weebly.com/uploads/1/3/0/8/130873826/dazam_kejanijutasi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4410694/normal_605c2899b1767.pdfIn PDF document text
- http://artdebug.site/lorakutobeyqipc.pdfIn PDF document text
- http://umkatrade.ru/honda_cb400a_service_manualoei53.pdfIn PDF document text
- https://cdn.sqhk.co/kibukumivu/kZejhjf/9455551989.pdfIn PDF document text
- http://circus.market/kafotowegisolaw6mwy4.pdfIn PDF document text
- https://lokaxanexu.weebly.com/uploads/1/3/4/6/134638146/sexojimebu_bidaguliz.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://rekutuvogunavur.rf.gd/chipotle_chicken_burrito_bowl_nutrition_information.pdfIn PDF document text
- https://827a6da4-a69c-4806-aaaa-db522494bc4d.filesusr.com/ugd/cb5916_5ad8a7ba32244e87839cedfd71881837.pdf?index=trueIn PDF document text
- https://8dea6f00-b35b-4e5f-9f5e-01d9eb130a9a.filesusr.com/ugd/6a8da5_c02758a9d865479caef3219842c9551b.pdf?index=trueIn PDF document text
- https://f05e0dbb-21cf-40ea-8b71-00b8d6f49a3b.filesusr.com/ugd/b09e1d_2d42e49e774f466cb03d1a18165acba1.pdf?index=trueIn PDF document text
- http://wusudafatuzawe.epizy.com/dodatamejeguke.pdfIn PDF document text
- https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_2adc6a566f834e399ce6c0d9cf3bec5c.pdf?index=trueIn PDF document text
- 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000df7d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF7D	4964 bytes
SHA-256: `dc000a4db94b064e00bcff75ba8a58bb4d703c10cc5d7c6d92996f8d255dae33`
`font_01_sfnt_off0000f07f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF07F	13080 bytes
SHA-256: `1fe6fbddd27d50d6d7dc0198e314ddaaf7c9ba1a3542b9940aae353782e1c9c7`
`font_02_sfnt_off0001192d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1192D	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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