Malicious PDF — malware analysis report

Static analysis result for SHA-256 3893ef644eb8ea04…

MALICIOUS

PDF

72.6 KB Created: 2021-01-05 14:35:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4dfb9054ded5ca0ed2fdf456acc73e10 SHA-1: b98cba73468f70527fca90c75aa5091b8a86d442 SHA-256: 3893ef644eb8ea04118d83136f7a93e14481cfa28f3081c879adf5610cc9a371
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for a phishing trojan. The PDF contains a large number of external links, suggesting it is part of a link farm or SEO manipulation scheme, with one URL pointing to a potentially malicious domain. The presence of embedded URLs and the overall structure strongly indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/123?utm_term=tuna+steak+calories+6+oz PDF link annotation
    • https://cdn.sqhk.co/nuwalimo/hdihMid/rolling_stones_t_shirt_women.pdfIn PDF document text
    • https://cdn.sqhk.co/faxidopudome/4vu4gfi/yellow_apps_to_download_iphone.pdfIn PDF document text
    • https://metiganad.weebly.com/uploads/1/3/4/6/134659194/gupef.pdfIn PDF document text
    • https://cdn.sqhk.co/jisanipu/hhmghcr/the_killbox_apk.pdfIn PDF document text
    • https://watorixaziju.weebly.com/uploads/1/3/4/5/134586039/8159429.pdfIn PDF document text
    • https://jazejuvo.weebly.com/uploads/1/3/4/4/134439384/3557787.pdfIn PDF document text
    • https://pubabugolutaj.weebly.com/uploads/1/3/2/6/132680974/fejogetilo.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/Stvoyhf/teaching_english_grammar_vk.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/31e6a5eb-d373-4bcf-a7a2-c2bb5695c711/zugole.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/bloons_super_monkey_hacked_unblocked_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b44ed4fb-bebe-42fc-9c7c-b66c515e89ce/beastie_bay_building_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/288b6ea9-a066-43a1-89c8-2ceaae943435/molto_vivace_music_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/25094981019.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/laporunaneduvidunajaxun.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/the_power_by_naomi_alderman_free.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_off0000d177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD177 5012 bytes
SHA-256: 897f9d87088e7db56efdc7bc8d95e839959b18769f2ab6b5423d3309b0927488
font_01_sfnt_off0000e29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29B 16048 bytes
SHA-256: 2a52db3fe3004f118d80bd345dd9c072edff94665834d41b1a1272abc4640403

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