Malicious PDF — malware analysis report

Static analysis result for SHA-256 527fd006327166ee…

MALICIOUS

PDF

102.7 KB Created: 2021-04-13 05:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dd5fe76ea8e27aecd965717574979713 SHA-1: c396f3819ecede578002710577ef8d68c11862d5 SHA-256: 527fd006327166ee7bce6482e5b4dfaa10393ad3b84aa54bd47335e5a95abf69
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 0.9995

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://vilenefex.ru/strik?utm_term=the+crucible+act+2+character+map+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402503/normal_5fe12bd0eec2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446165/normal_606275d6d9038.pdfIn PDF document text
    • http://gejudoxe.mypressonline.com/62440399325.pdfIn PDF document text
    • http://fibiver.mygamesonline.org/sazerajosijipabesani.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481280/normal_5fd04a0b32874.pdfIn PDF document text
    • https://zogewuvenofo.weebly.com/uploads/1/3/2/6/132683334/2a299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479705/normal_602bdac0e8564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379482/normal_600ea4708343c.pdfIn PDF document text
    • https://zizovotitimojuv.weebly.com/uploads/1/3/2/7/132712514/kipeno.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fazobelo.onlinewebshop.net/complete_metric_space.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/gelorijojikavag.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/fuzemanapamobisejokoz.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/clayden_organic_chemistry_free.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/is_chamomile_cooling.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/97267472705.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/latest_blouse_neck_models.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/67030679326.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/how_to_put_together_a_spalding_portable_basketball_system.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/twitch_sub_emotes_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/politically_incorrect_guide_to_catholicism.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/jabuwakoxabija.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/how_to_create_fresh_water_from_seawater.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/naruto_ultimate_blazing_beginner_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/where_to_donate_your_clothes_for_money.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_off00015426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15426 5652 bytes
SHA-256: ce602f9d7d57cfa55bac842ea5da3ff248ea1eef110760d9dc93c6d679fcbc34
font_01_sfnt_off00016748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16748 11028 bytes
SHA-256: d61960a4dede2ec43e44f4de03259127e530b8059bb6822897a9d7b582d0448b

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