Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2e9bbb4b1a735b…

MALICIOUS

PDF

73.3 KB Created: 2021-03-25 07:19:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ca6051d2d1ecd6ddf361e5f08a1e2b7a SHA-1: 296a649ead1c29d04cbc675a0e5847e89686a18c SHA-256: 8f2e9bbb4b1a735be2456c587f3343191fa7ce1eb0b2b0f405310f05d54aadc8
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=sonicwall+tz+205+latest+firmware PDF link annotation
    • https://cdn.sqhk.co/modebopogut/Nge9hdn/old_national_bank_terre_haute_jobs.pdfIn PDF document text
    • https://lukijijuvuz.weebly.com/uploads/1/3/4/7/134742917/bodozuzutawed_sutuvusife.pdfIn PDF document text
    • https://cdn.sqhk.co/lodikorep/iwligii/virgin_mobile_ksa_recharge_code.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/barbell_exercises_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/vidikusupegu/egeyjgT/pititi.pdfIn PDF document text
    • https://betebawaxudu.weebly.com/uploads/1/3/5/3/135388356/24c0fe6acd.pdfIn PDF document text
    • https://kuvitarige.weebly.com/uploads/1/3/4/0/134095916/f7a0daa9241ca.pdfIn PDF document text
    • https://cdn.sqhk.co/dakubakasilu/jhmGjaJ/free_printable_word_search_puzzles_christmas_tree.pdfIn PDF document text
    • https://cdn.sqhk.co/sapugelezuf/hdjhjiA/62599283690.pdfIn PDF document text
    • http://jarokixepoweso.mypressonline.com/gavijonisejapegeb.pdfIn PDF document text
    • https://losebevaxefot.weebly.com/uploads/1/3/5/3/135347065/pupix-vidifelagoti.pdfIn PDF document text
    • http://demunanenika.iblogger.org/28409190455.pdfIn PDF document text
    • http://xumetosakonir.iblogger.org/aptitude_test_questions_and_answers_of_tcs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://siwavubixuvavil.rf.gd/wabibite.pdfIn PDF document text
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_63e0848033f84c9ea854a633f709bd81.pdf?index=trueIn PDF document text
    • http://tobovewebejana.epizy.com/adolescent_health_issues.pdfIn PDF document text
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_ee69f6a4aab3457a86ecc02dc843f257.pdf?index=trueIn PDF document text
    • http://wodebupikeziv.epizy.com/45254664957.pdfIn PDF document text
    • https://089130c0-62ae-4bf1-a93c-656440fe8451.filesusr.com/ugd/738632_5f4344d2316a4aa485af6505849b41e9.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_off0000e08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08C 5672 bytes
SHA-256: 5c4497f24caa3322fc9f43cfe35cc84ef78b3a6f2c998d757775c2345d612469
font_01_sfnt_off0000f3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E3 10588 bytes
SHA-256: 93cde8840accd489fde56478e268406e517ca30eac3440d7d1c58306a061f824

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