PDF malware analysis — malicious · d89941e53a9585da

MALICIOUS

PDF

80.9 KB Created: 2021-03-31 17:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 38443497a6b39172443f2a3c152f5625 SHA-1: 9846bdb5ae19e74189e0f910034e37f4a45ec5ba SHA-256: d89941e53a9585daa302a020cdfffbdbab6579590bf30bfc78c968d72ad25d8f

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains an embedded URL that redirects to a link farm, likely intended to deceive users into clicking through to malicious content. The document body, though heavily obfuscated, suggests a search result context for technical documents, aligning with a phishing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 5

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 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://gimoguvi.ru/award?keyword=astm+a536+grade+60+40+18+pdf PDF link annotation
- https://static.s123-cdn-static.com/uploads/4369783/normal_5ff23abe54a10.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4412593/normal_6034cb843b765.pdfIn PDF document text
- http://mikapamaku.22web.org/bemobizupamudikivadufa.pdfIn PDF document text
- http://buviturowugigew.66ghz.com/61999486753.pdfIn PDF document text
- https://rokojilezel.weebly.com/uploads/1/3/2/3/132302907/zekaneso.pdfIn PDF document text
- https://latiratigu.weebly.com/uploads/1/3/1/1/131164156/7903016.pdfIn PDF document text
- https://juxusuvib.weebly.com/uploads/1/3/0/7/130739690/911af.pdfIn PDF document text
- https://dosodufixelo.weebly.com/uploads/1/3/2/6/132682620/doradejuge.pdfIn PDF document text
- http://diwolekeku.22web.org/pevomedanepifakozoropolu.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://jizeketima.epizy.com/android_espresso_wait_for_idle.pdfIn PDF document text
- https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_edd9dbe16e2e40b7968beab08e5b04e8.pdf?index=trueIn PDF document text
- http://dibadedogiw.epizy.com/viwonawonapabivududefibu.pdfIn PDF document text
- http://fufaxame.rf.gd/chemistry_notes_for_ssc_exam.pdfIn PDF document text
- https://s3.amazonaws.com/sefepugolupalax/73427588135.pdfIn PDF document text
- http://limuzanesaz.rf.gd/porter_cable_150_psi_air_compressor_leaking.pdfIn PDF document text
- https://s3.amazonaws.com/babuxufarizuxur/40984046774.pdfIn PDF document text
- https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_7290f60aa6824f1d8eb87c2eb7444502.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/vasofirida/the_complete_combustion_of_hydrocarbons_worksheet.pdfIn PDF document text
- https://73af689e-4c80-4f62-99d3-7a886641ad81.filesusr.com/ugd/3b5dd9_538ccf5b4cf947d4be1ec60513a34450.pdf?index=trueIn PDF document text
- http://sozogakuvigoxev.epizy.com/budekugewojexisidafemewo.pdfIn PDF document text
- https://fb79ad55-22b5-4823-9538-35c71bbbd514.filesusr.com/ugd/ea423f_ebb124cb452d4b3cbbe3244bb6abe0d2.pdf?index=trueIn PDF document text
- https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_8bf6533031434a858b99607c837400ae.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
- 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_off0000e55d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE55D	6236 bytes
SHA-256: `efd50cb1d009bc9f1012d291aaec79c791bc17b8ad8ad925a3e3c75855085726`
`font_01_sfnt_off0000fa7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA7F	11208 bytes
SHA-256: `430efacc9c6935413c0a05cd217e1898c55b850635cb86d2ce02e6fcc42163b7`
`font_02_sfnt_off000120bc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120BC	16136 bytes
SHA-256: `4a82d930af4ff3021f3d19cbd37464c8e664c90bef13661c9db69df894853898`

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