Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d57e6356ebc057…

MALICIOUS

PDF

62.0 KB Created: 2020-11-13 09:08:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 52c43c65bd541f28bbec3dac82864c6a SHA-1: a743ef39eeddf8d8d47b31bc1c520cfc1b8da725 SHA-256: 64d57e6356ebc0576ae167ca27aee97cab6d3e4915024bfb331b89ce952448d3
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 as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a large number of external links, with a critical heuristic identifying it as a "PDF_SEO_LINK_FARM". One of the primary external links, https://trafficel.ru/aws?utm_term=3d+food+pyramid+template, appears to be a lure, disguised by the document's apparent content related to a '3d food pyramid template'. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to potentially harmful content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/aws?utm_term=3d+food+pyramid+template PDF link annotation
    • https://wonenizawelob.weebly.com/uploads/1/3/4/3/134315845/dabuzidap_banarosawakifa_dalidebefat_pubalo.pdfIn PDF document text
    • https://zinawadasug.weebly.com/uploads/1/3/4/3/134312837/fopijen-xoneloxoloziv-zatatiruxuvepoj-negobanogiga.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/belopudevuzuza/77848630532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f12786be-f697-41e6-8261-881df563afbc/18231692231.pdfIn PDF document text
    • https://s3.amazonaws.com/tefelaj/google_drive_proxy_site.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/self_certification_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/2969276767.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/barbara_stoler_miller_bhagavad_gita.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/27351860222.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/tecnicas_de_anclaje_pnl.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/west_bengal_state_university_registration_form_online.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/73611337713.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/lixumabarijisumum.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/mikorugonenotirutuk.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_off0000b7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B8 5180 bytes
SHA-256: fa8213b3de1448312442e17fe046c5653292017d4ea1e31338d3bad6b05c9609
font_01_sfnt_off0000c94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC94F 10036 bytes
SHA-256: a1f8f2bbe7def3a8e6af18fb9072efde223b3b3f24c0ecfc1c44b517ce477adf

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