Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9a7bb80e8fbaad…

MALICIOUS

PDF

64.8 KB Created: 2020-12-05 05:52:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 59ac0497ed2bd8037acd2c346d856aa5 SHA-1: 1084d71dce2157f18f587fb9828e8c3caadbc242 SHA-256: 0f9a7bb80e8fbaad4871b7ad941c5723f9712221ea7fef5553473db420fbb02e
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 0.9997

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://traffking.ru/strik?utm_term=cristina+petrescu+fspub+notite+cards PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392215/normal_5fa114a2b0959.pdfIn PDF document text
    • https://koxabiwepa.weebly.com/uploads/1/3/4/3/134309970/5718005.pdfIn PDF document text
    • https://betutinixe.weebly.com/uploads/1/3/4/4/134481053/wixasojumu.pdfIn PDF document text
    • https://bugalesatu.weebly.com/uploads/1/3/4/3/134309104/8e8fa50dfcac.pdfIn PDF document text
    • https://binezorimitujux.weebly.com/uploads/1/3/4/3/134337637/vutusu_bavofuzaguxix_ruzemimilejiwul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406223/normal_5fa4cf405dfae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0d57abd14ff0dd29c5223/t/5fcb0180bce7087d1ad55ddc/1607139713423/businessman_simulator_3_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea8b5889-c63c-416d-8378-589af3a49096/fukusose.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf8defa04221c71e68151/1606285535481/65796728274.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10ac260f2895dc1e8a19d/t/5fc5f6597acac6192a8f9a64/1606809178814/paxip.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51f41c30a162e0c6ddaa3/t/5fc680ff5147b14804146c49/1606844672387/flower_garden_ideas_pictures.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfc403570fb44d1c92e02/1606286402577/88324055351.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd052300f7af3919d4a08b/1606223140102/wuvefusupogulik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85be311d-cce6-479f-ad66-ca0e82a09a1c/34090113256.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_off0000be7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE7E 5160 bytes
SHA-256: 5dbd92b428d22a1977a7b87807f41a4bd8225cc50971965a869eb057c0e4e8fa
font_01_sfnt_off0000d00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00D 11684 bytes
SHA-256: 82ef1457cfbc1951d48d22cc2352d5756df796406141cd1c2598f4a22ee68956

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