PDF malware analysis — malicious · d6aded321efa6776

MALICIOUS

PDF

85.4 KB Created: 2021-04-06 15:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 76e1ec7b0f44f4f3ffefd8f2eb94b8a1 SHA-1: 8d557d1b5dffd166c8eb753948e964b471b4fb63 SHA-256: d6aded321efa6776d8e9656f427b8f7188407320bfb3b5a2fef86148a8103a4c

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to obscure malicious links within a large number of seemingly benign ones. The presence of external URIs and the overall structure suggest this PDF is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://baarspo.ru/aws?utm_term=what+does+the+phrase+popular+culture+mean PDF link annotation
- http://tuwatolu.22web.org/questes_administrao_pblica.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4466172/normal_5fe11cdc152cc.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4465556/normal_5fcb9c5bc8865.pdfIn PDF document text
- http://fusifasuroxeso.22web.org/35550485179.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4454824/normal_5fc959a2c393a.pdfIn PDF document text
- http://bolagafub.iblogger.org/17740389476.pdfIn PDF document text
- http://vizilamu.22web.org/82078413309.pdfIn PDF document text
- http://betafiwes.iblogger.org/surge_arrester.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495393/normal_602925a270aec.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385435/normal_602cfe52a0dc0.pdfIn PDF document text
- http://pimolala.22web.org/sample_mba_recommendation_letter.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://sosuxuzobives.epizy.com/active_and_passive_voice_story_and_exercises.pdfIn PDF document text
- https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_1a93f7a6cc684940b983a025022531a1.pdf?index=trueIn PDF document text
- http://lamafuravufezin.epizy.com/71903080947.pdfIn PDF document text
- https://61249681-e2d1-4375-841a-b3723294d79c.filesusr.com/ugd/3d514e_951075ed32494d10ac5879caa032b4d0.pdf?index=trueIn PDF document text
- http://mazolofoju.epizy.com/59351449355.pdfIn PDF document text
- http://pobopujobezov.rf.gd/pumusikajomopukovuliv.pdfIn PDF document text
- https://24b051fc-04af-4e2d-8b9e-4e75c06063ec.filesusr.com/ugd/1a488c_9f0abcd513b94aa7a6bddb40ecb07868.pdf?index=trueIn PDF document text
- http://muvusibose.rf.gd/absceso_hepatico_manejo_quirurgico.pdfIn PDF document text
- http://xupudajiwozov.epizy.com/the_bartender_s_bible_free_download.pdfIn PDF document text
- http://muwadobekele.rf.gd/banojogilijifawike.pdfIn PDF document text
- http://makeromevoju.rf.gd/technical_business_analyst_interview_questions_and_answers.pdfIn PDF document text
- http://vufudaz.rf.gd/89796701411.pdfIn PDF document text
- http://rinexabe.rf.gd/malayala_manorama_epaper_today_download.pdfIn 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_off0001006f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1006F	5160 bytes
SHA-256: `d54c6057017982f22a5913df482d0b4ab74143a80e4a3525eb01a5b8eaacd2db`
`font_01_sfnt_off000111dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x111DD	11276 bytes
SHA-256: `3412a624e50689025383dc001e0e0b61fd0e1426cc85a801a7fe0a32f492244b`
`font_02_sfnt_off00013824.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13824	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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