Malicious PDF — malware analysis report

Static analysis result for SHA-256 f94b4ca3a62c8108…

MALICIOUS

PDF

79.9 KB Created: 2021-06-07 02:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 12776af873c03f9b203186a8af8b03c6 SHA-1: 525100afd7f3c3d289ad54da41eaa60d230c2b77 SHA-256: f94b4ca3a62c8108f3a9c485cb536422ca4847a9eb51d24e6b8d09e1f3001b27
194 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The presence of a 'download button' lure and a ClamAV detection for 'Pdf.Phishing.Trojan' strongly indicate malicious intent. The document's content and structure are consistent with attempts to trick users into visiting malicious sites, likely to download malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gimoguvi.ru/123?utm_term=utorrent+with+crack+free PDF link annotation
    • https://xinefozi.weebly.com/uploads/1/3/0/7/130775465/e561fa.pdfIn PDF document text
    • https://zagozejidenadap.weebly.com/uploads/1/3/1/4/131407028/6a1a5e.pdfIn PDF document text
    • https://tekipagitew.weebly.com/uploads/1/3/4/8/134871071/229448.pdfIn PDF document text
    • https://govasosu.weebly.com/uploads/1/3/4/5/134519533/707812611c.pdfIn PDF document text
    • https://jitosagar.weebly.com/uploads/1/3/4/3/134318128/2985008.pdfIn PDF document text
    • https://wejolizamu.weebly.com/uploads/1/3/4/7/134766198/betutubexojoj.pdfIn PDF document text
    • https://xiluruzubu.weebly.com/uploads/1/3/0/8/130813732/437168.pdfIn PDF document text
    • https://sojabejob.weebly.com/uploads/1/3/4/8/134890412/4838664.pdfIn PDF document text
    • https://saxipapes.weebly.com/uploads/1/3/0/7/130738636/zupakesudi_xofez_vatatos_kagupolur.pdfIn PDF document text
    • https://limezisetuf.weebly.com/uploads/1/3/4/8/134871661/9483057.pdfIn PDF document text
    • https://fowanexi.weebly.com/uploads/1/3/4/6/134648222/pajipodir.pdfIn PDF document text
    • https://nugasoxitobaj.weebly.com/uploads/1/3/2/7/132710773/8096395.pdfIn PDF document text
    • https://lexikujufuwu.weebly.com/uploads/1/3/4/6/134613894/wagijawinif_tinexi_digoralibofobu_tinukegezogorus.pdfIn PDF document text
    • https://rugomekedakore.weebly.com/uploads/1/3/5/3/135302214/mulatemotelepudu.pdfIn PDF document text
    • https://putesoborufo.weebly.com/uploads/1/3/0/8/130814126/xujezigudujerag.pdfIn PDF document text
    • https://dirututusobed.weebly.com/uploads/1/3/5/3/135347210/desomijurawe.pdfIn PDF document text
    • https://lefilima.weebly.com/uploads/1/3/0/7/130775934/8971781.pdfIn PDF document text
    • https://gedenotovet.weebly.com/uploads/1/3/1/3/131379555/gotodapuwinevukajawu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mefijunov.pbworks.com/f/vupoke.pdfIn PDF document text
    • http://xutosop.pbworks.com/w/file/fetch/144462870/how_to_reset_samsung_vrt_washer.pdfIn PDF document text
    • http://gezebal.pbworks.com/f/47763653839.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_off0000f96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96C 4904 bytes
SHA-256: 8c3c9b67ddb222a4b476c2b975abcef881b95acc6965a37b7580900a80d17597
font_01_sfnt_off00010a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A31 11284 bytes
SHA-256: 5b22ef916c8bc2c5fd0fdb924a3bfdaf104d545243c5c6a3eb910e06a8e36715