Malicious PDF — malware analysis report

Static analysis result for SHA-256 c801ae49f601eb71…

MALICIOUS

PDF

77.7 KB Created: 2021-03-14 19:05:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e56cb967df57c076d6ef20b0e26f9983 SHA-1: 87965eba7d66147c0776f73ba48296ebe9083692 SHA-256: c801ae49f601eb714aba9cc7ab11ce52d1509fb2b5340d66afbdbe3d9cd9c172
126 Risk Score

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 0.9997

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://pelibifir.ru/wix?keyword=dream+car+racing+unblocked+evo PDF link annotation
    • http://logmeinnow.xyz/59483754472w56ug.pdfIn PDF document text
    • http://prod-fruit.space/bonomovom2b9ih.pdfIn PDF document text
    • http://rastet-malysh.ru/best_life_in_the_uk_book3aeds.pdfIn PDF document text
    • http://erogan-oficial.site/lg_fridge_service_centre_in_coimbatoreomkda.pdfIn PDF document text
    • http://yatvoyya.fun/whats_good_on_white_sauce_pizzar6bo4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5fe827ce83cea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413703/normal_604ca30fa3549.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379610/normal_604ab3336aa8d.pdfIn PDF document text
    • http://testvvd.xyz/gcse_maths_enlargement_negative_scale_factor9igms.pdfIn PDF document text
    • http://flymoney.net/pigoforajepilatugirt9lr.pdfIn PDF document text
    • http://llloooodddd.space/7531318430bnv8y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474223/normal_6018bcaa49228.pdfIn PDF document text
    • http://organicsss.space/abrsm_piano_grade_8_scalesfyuft.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/teruworo0893e.pdfIn PDF document text
    • http://mnatural.space/collection_manager_roles_and_responsibilitiessc8b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411686/normal_5fe2ae8fc8667.pdfIn PDF document text
    • http://detonic-romania.website/talilawelarumakupacnbe5.pdfIn PDF document text
    • http://liniwugo.iblogger.org/how_do_i_clean_my_maytag_bravos_mct_washer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://livuwiga.rf.gd/mcqs_in_local_anesthesia_in_dentistry.pdfIn PDF document text
    • http://fukanabe.epizy.com/70340800729.pdfIn PDF document text
    • http://sulunaza.epizy.com/sasixawel.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_off0000f40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40A 5344 bytes
SHA-256: a6ac7832e12ffe4648e9f46aff50d51139a41d5c3b7a090a9a7394a0143b5b2c
font_01_sfnt_off0001062a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062A 10276 bytes
SHA-256: 4de483335426c384f2c304337077569a6606b7714982d34691e3174bd0d4115b