Malicious PDF — malware analysis report

Static analysis result for SHA-256 44997c8735dc3ed4…

MALICIOUS

PDF

95.2 KB Created: 2020-12-28 01:23:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f6da0fdfd506e17cabc05b1dbf746471 SHA-1: 9209c4b73cc7ae3a2bc1f797636c4681237a5701 SHA-256: 44997c8735dc3ed4f4cc75364ded11e314ade963f3915e794a38ad2a686f2dfe
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are to benign-looking documents, but one prominent URL, 'https://traffset.ru/123?utm_term=darker+fifty+shades+darker+as+told+by+christian+movie', is flagged as unknown and is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing lure.

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://traffset.ru/123?utm_term=darker+fifty+shades+darker+as+told+by+christian+movie PDF link annotation
    • https://nitiruminaxodax.weebly.com/uploads/1/3/0/7/130738633/jevideriretu.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/dbe4d798b6f982.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/85152cb5-2cf5-438f-90d9-1b0ddb2a88d6/psychology_advising_umd.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/metals_in_high_demand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acfc96de-47f3-4027-9012-4e52bab34d4b/8879492553.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/christmas_card_templates_printable_black_and_white.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/921352b1-5707-4301-ad48-4c18c0eb9cf2/watch_online_movies_malayalam_123.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/chimera_tool_cracked_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/kerimikigod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8a0e515-e5dc-498d-8eed-f1f8e27365ba/swivel_sweeper_g2_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/95524394363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f354ccbc-7373-4e4f-9107-aa63e2738d61/76377659519.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/patebib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4454f80-01ea-4979-8ba2-ea65136c336e/corel_draw_9_free_download_full_version_with_crack_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/free_templates_for_family_tree_chart.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12703 5412 bytes
SHA-256: 2fc1beed2f1a09ab5445a5ba848b924862e81c538cbc376768b5ca168960e13b
font_01_sfnt_off0001394a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1394A 11772 bytes
SHA-256: 42df2d39d8b6d3457ede87e38b332df34808fe55b0702fb34f203ec813ce3e8a
font_02_sfnt_off00016123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16123 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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