Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6a6b5a6888d793…

MALICIOUS

PDF

81.9 KB Created: 2021-03-29 02:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 930610ea4528e9f3f950051dbe766b9d SHA-1: badfbf37d7abc8a7ce940b6b36af16b2805c6ad1 SHA-256: 0d6a6b5a6888d7935d87b4fb2be7dcd8954d47a6216ffd3f7a9643c09806fd97
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a phishing or scam campaign, employing a link farm strategy to direct users to external websites. The presence of numerous external links, including one to 'pelibifir.ru', and the ML classifier's high confidence score indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users for malicious purposes, likely related to the lure of a 'node unblocker for roblox'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://pelibifir.ru/wix?keyword=node+unblocker+for+roblox PDF link annotation
    • https://binenivav.weebly.com/uploads/1/3/4/5/134516867/tedavokizorawo.pdfIn PDF document text
    • https://gidapozu.weebly.com/uploads/1/3/1/3/131379371/timuverilemozi.pdfIn PDF document text
    • http://vvinorama.website/dodetixinutajejogapegie64t9.pdfIn PDF document text
    • http://mini-cam-v2.club/427721978289fuze.pdfIn PDF document text
    • https://zebazowis.weebly.com/uploads/1/3/4/3/134310266/8370ac0595.pdfIn PDF document text
    • https://rugomekedakore.weebly.com/uploads/1/3/5/3/135302214/tiganexa.pdfIn PDF document text
    • https://mexubigewexuni.weebly.com/uploads/1/3/1/3/131384635/jozigowusojowuja.pdfIn PDF document text
    • https://lajutiruwogow.weebly.com/uploads/1/3/4/5/134585316/xosakolubufit_fazini_romozososo.pdfIn PDF document text
    • https://bukivobiwizu.weebly.com/uploads/1/3/4/0/134097020/bigabaz-pigirav-xeratudogi.pdfIn PDF document text
    • http://vaxuserinux.22web.org/do_bose_soundsport_wireless_headphones_work_with_android.pdfIn PDF document text
    • http://subonus.ru/autopage_xt-72_lcdlk2e5.pdfIn PDF document text
    • http://randname.ru/kenmore_500_washer_just_stopped_workingg549z.pdfIn PDF document text
    • https://bafuvigugasud.weebly.com/uploads/1/3/5/3/135308410/safowojevar_tosamew_kewelobagigiwez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e9593579-f51f-4dc6-af55-2543ab512b45.filesusr.com/ugd/37952c_f41ef3fbc0184018b015b91226141571.pdf?index=trueIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_8079176c184d4624ad8e6e32f4648253.pdf?index=trueIn PDF document text
    • http://gakafola.epizy.com/application_of_derivatives_class_12_formulas.pdfIn PDF document text
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_ebe3d36ee6aa496cbbed94d2bacd4c18.pdf?index=trueIn PDF document text
    • http://dobejul.epizy.com/remijipigerejubigu.pdfIn PDF document text
    • http://lafonariki.rf.gd/wibiwilipa.pdfIn PDF document text
    • https://3d636ecf-b5c4-4691-845c-2d501a7a8090.filesusr.com/ugd/b09df1_e6c835874e7f412988b1d0792428e094.pdf?index=trueIn PDF document text
    • http://pezokom.epizy.com/logical_deduction_questions_and_answers.pdfIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_6dfcd73d8c494423803e90b0557f01f5.pdf?index=trueIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_602dfb8800d34086824d73f981ae6562.pdf?index=trueIn PDF document text
    • https://0bf12466-9c44-4b11-a9a5-fac9ce0d1baa.filesusr.com/ugd/f34823_852af97ee99a4e4eb0a1aea049737cb0.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCF 4868 bytes
SHA-256: 94c0dd9dbe3a33bd780b39519f0ca74ce62f16c28d7db1f6b411b52d43da84a7
font_01_sfnt_off00011078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11078 11804 bytes
SHA-256: 00695b05b63c2f66a22785a12fb06bfcacf3c18c210f5c8da69dcf930c2a12d5

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