Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c2055e46bce456…

MALICIOUS

PDF

76.4 KB Created: 2021-01-25 13:08:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5a0bd8dc34f8e45e0a405426446b1d45 SHA-1: d9c249512f51f0d69bacd2f6b0ee3d653f74c86c SHA-256: 70c2055e46bce456f79650f5c1c5e40299770c061a47d5b83d862cd87c5787fa
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF that contains a large number of external links, many of which point to PDF files, suggesting a link farm or SEO spamming technique. The ML classifier and ClamAV detection strongly indicate maliciousness, specifically a phishing or trojan. The embedded URL points to a suspicious domain, likely serving as a lure for users.

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 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://baarspo.ru/123?utm_term=sour+honey+and+soul+food+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484365/normal_5feb62680d310.pdfIn PDF document text
    • http://lalexejiwisejul.iblogger.org/medical_certificate_form_1a_haryana.pdfIn PDF document text
    • https://dutumeparozawa.weebly.com/uploads/1/3/1/1/131163590/7e842073bb1a8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388824/normal_5febce9a5ba88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447431/normal_5fd1744f623b7.pdfIn PDF document text
    • https://keduwiwisa.weebly.com/uploads/1/3/4/4/134486116/d20c51ec1a.pdfIn PDF document text
    • https://fuviwezajoz.weebly.com/uploads/1/3/1/3/131379384/gevukepu_zawikuvavo.pdfIn PDF document text
    • http://suxawid.iblogger.org/bandolino_cambria_platform_booties.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421770/normal_5fe26863d2a93.pdfIn PDF document text
    • https://tezulitu.weebly.com/uploads/1/3/4/3/134316961/b824c.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/laxefedoruxeb-sakepolova-gidobifakat-danewupu.pdfIn PDF document text
    • https://gepumisi.weebly.com/uploads/1/3/4/5/134517510/namugafureti_sawisogipis_xazomiseramapo_vobexazodelo.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/tigewibejageju/72778867894.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/ceragon_fibeair_ip-_20g_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/42006348012.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/pepifapela.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/alone_full_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/54186537187.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/polyethylene_foam_sheets_san_diego.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/bunufi.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_off0000ece3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE3 5428 bytes
SHA-256: 786dd6bd7dd745455b0f635eaf4c9642af575520147e26607abd864c551a9187
font_01_sfnt_off0000ff6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6B 10748 bytes
SHA-256: 4d595a812c78aad5b3da0c5e0b55d8f47ad2a51eaeb883e812967904d5c4ae80

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