Malicious PDF — malware analysis report

Static analysis result for SHA-256 abdc9fd0f0280cee…

MALICIOUS

PDF

79.6 KB Created: 2021-03-18 10:02:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b84c9e6c4d6b1e89dbd0940c5da574f6 SHA-1: 2a1d40a2cd230e5fdcf0693458917577787807e2 SHA-256: abdc9fd0f0280cee035a1ef237f0a5eebc748eab9ab22bdd58a87062810abf86
186 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 0.9994

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://fokemale.ru/123?utm_term=aggiornamento+android+8+honor+6x PDF link annotation
    • https://xazujojupise.weebly.com/uploads/1/3/4/4/134493550/3845407.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457332/normal_6049938e7fc2f.pdfIn PDF document text
    • https://dabituge.weebly.com/uploads/1/3/4/3/134344098/nazuja_megavisime_jevabujunatum.pdfIn PDF document text
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/mojibirorurixozofol.pdfIn PDF document text
    • https://wamukefak.weebly.com/uploads/1/3/5/3/135324497/88242a7bb1e96.pdfIn PDF document text
    • https://zowuxebikazusi.weebly.com/uploads/1/3/4/6/134654267/64fecae8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389127/normal_60158362e78b7.pdfIn PDF document text
    • https://nijolonarezop.weebly.com/uploads/1/3/3/9/133999518/4019638.pdfIn PDF document text
    • http://texewofe.22web.org/farmall_h_tractor_parts_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_5fd201521eae4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443372/normal_6006150576138.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408601/normal_6003b513451e5.pdfIn PDF document text
    • https://favotofuti.weebly.com/uploads/1/3/1/8/131871633/4df517251.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380691/normal_5fcf96c8609ab.pdfIn PDF document text
    • https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/1183798.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/kimone/current_weather_report_in_pune.pdfIn PDF document text
    • http://fexewagesulel.epizy.com/ginagibixenavi.pdfIn PDF document text
    • http://tedizixulore.epizy.com/sawapurufeliburogisoduv.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/3339396683.pdfIn PDF document text
    • http://rokidibamufoduv.epizy.com/sovonigodejipugatunalag.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/33570341947.pdfIn PDF document text
    • http://refewebol.epizy.com/54168616702.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/anno_1800_sunken_treasure_guide.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_off0000f798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF798 5432 bytes
SHA-256: 0b1c145b8917b88a04dd325ca84d65bd216d3d6d374d190ecc3b3fe83277c044
font_01_sfnt_off000109ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EE 11348 bytes
SHA-256: 62c359aaca135a1d48dd9347cf26822d322caa1fcb5a7dd6c9d2ccf84a7de167

Open this report in the interactive analyzer, or submit your own file for analysis.