Malicious PDF — malware analysis report

Static analysis result for SHA-256 73b755cfa19fd011…

MALICIOUS

PDF

74.6 KB Created: 2021-05-04 12:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 85f172d4d7cee5e3a37287710a0b752b SHA-1: 92073aa3047ec41097ad573b566f79b6b3883e38 SHA-256: 73b755cfa19fd011943ecdeb0a09e6b7c111b69952e81742026fb17d26696369
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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 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.
  • 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=dell+laptop+latitude+e6430+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454426/normal_5ff0159fd8eea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450509/normal_606a7fab7fe24.pdfIn PDF document text
    • http://zabavnyi-slon.ru/home_assistant_template_sensor_icon_colort7prk.pdfIn PDF document text
    • http://mon-fortuneo.best/20041371336vxuju.pdfIn PDF document text
    • https://zilununuta.weebly.com/uploads/1/3/4/4/134490292/vadifegumi-goronisadim-pulofidapube-loxuf.pdfIn PDF document text
    • http://workbykoder.xyz/jegebudogexofimoduvuleyqq3p.pdfIn PDF document text
    • http://toportt.online/how_long_was_the_great_depression_in_canada05jsm.pdfIn PDF document text
    • http://trydouche.xyz/72873030053iogfm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420449/normal_6019dae896d39.pdfIn PDF document text
    • http://hugertely.xyz/568551079042lvzw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388842/normal_60240f7a364d6.pdfIn PDF document text
    • https://doleroxewaforud.weebly.com/uploads/1/3/4/3/134322791/454c979d.pdfIn PDF document text
    • http://leadtop.co/is_marla_maples_married_againf4t4u.pdfIn PDF document text
    • http://shortsomfj.space/best_3ds_emulator_for_android_apkt4evu.pdfIn PDF document text
    • http://lnstagrambusiness.com/carrocerias_ganadeiras_molas1ruwl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499309/normal_605a4039c9731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421217/normal_6063b04502015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485587/normal_6060396f4d5a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/repesusevi.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/best_ice_breaker_questions_for_online_dating.pdfIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/39300866464.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/chloroplasts_and_mitochondria_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/75334275216.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE437 5376 bytes
SHA-256: 9b6aa40edf3bf79e66cd6517408cf20140682f7f8d67ba0fcec47397c74cd344
font_01_sfnt_off0000f67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67F 11356 bytes
SHA-256: ce895ece63538262e8cda86ba31224dbb2d3175f942b9a4093ae2052bb3c1b64

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