Malicious PDF — malware analysis report

Static analysis result for SHA-256 a25ba5f0f6cc516b…

MALICIOUS

PDF

82.1 KB Created: 2021-03-17 01:19:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fe44be1cbf1221a8ceb65cfe4a2f5d8d SHA-1: 5fad5db1dad6d7bb300222c12cbc8b4ff1f87135 SHA-256: a25ba5f0f6cc516baec9ceef42662e74f42c0595cbf1b439fe43e132504366cc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://ponafet.ru/strik?utm_term=filtrete+3m50+thermostat+troubleshooting PDF link annotation
    • https://cdn.sqhk.co/xunijejozi/jijifeh/84378786883.pdfIn PDF document text
    • http://3gusevshop.space/gillette_fusion_proglide_power_vs_manualh6bxz.pdfIn PDF document text
    • https://cdn.sqhk.co/rasetiwulipu/zggPjjg/game_assassin_creed_identity_offline_atau_online.pdfIn PDF document text
    • http://polypak.site/266821825931he4n.pdfIn PDF document text
    • http://glawerry.online/desaxorefexvzad9.pdfIn PDF document text
    • https://cdn.sqhk.co/rebamomidaw/cjfHjed/free_cartoon_channel_on_airtel_dth.pdfIn PDF document text
    • http://rozel.ru/percy_jackson_first_book_in_seriespldm8.pdfIn PDF document text
    • http://kolomata.ru/318167617671qt4q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e260575d-8a4f-422a-8474-940fbbf2bc44/lakegobelidesavavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d8bde72-9371-4fcd-a332-12a36584d63f/good_way_to_learn_phrasal_verbs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa5d52a4-4d33-442d-b13f-4980bac147af/73678513340.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/treatment_of_barbiturate_poisoning.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/employment_reference_check_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb89483a-315e-45ab-b7f4-d45d7adf123b/fantastic_mr_fox_book_sparknotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8166e39e-f6a0-4231-bc2b-89bafa6bac71/rapomole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef9dcfb9-9b33-4d47-8194-126efb7dca03/persuasive_essay_topics_for_4th_graders.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/650081af-9263-4e32-9a33-446ee3a549ee/what_pants_to_wear_with_a_navy_blue_shirt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26fce014-20c2-4f26-a194-e90066ead4ea/what_is_the_difference_between_adobe_pack_and_acrobat_pro_dc.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/74931859258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6090c17-b66b-4919-b015-896279887599/rumavuguburukule.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF69 5624 bytes
SHA-256: 9bec4c328ad04ebeac49f786c51830fb301b724bb52d83b24a6b9437fe55fcfd
font_01_sfnt_off0001125a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125A 11896 bytes
SHA-256: afcc3e5e8b1fc3af790a8b83f428e30cf22be8d50fdaf1316475744d62f100fa

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