Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f65a0f5fcd3f6a…

MALICIOUS

PDF

65.4 KB Created: 2021-02-15 09:10:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e0b4f703c9c6b66144652e00c384444f SHA-1: 91030114ea5bf61a55021f70dbf178881556e46f SHA-256: f3f65a0f5fcd3f6aa2da8616c900b84202703bef51ad64ec57e235589955cfc8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or SEO manipulation scheme.

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://jacksth.ru/123?utm_term=destiny+2+ahamkara+bones+locations+shattered+throne PDF link annotation
    • https://jetukuzimol.weebly.com/uploads/1/3/2/6/132695660/gatenid_dafugolibeteta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391340/normal_5fdfdc9b87f1b.pdfIn PDF document text
    • https://vefajuvajodal.weebly.com/uploads/1/3/6/0/136094574/zulol.pdfIn PDF document text
    • https://vevikonupefafo.weebly.com/uploads/1/3/5/3/135391347/6045630.pdfIn PDF document text
    • https://fisomekoxow.weebly.com/uploads/1/3/5/3/135326807/sujepikasilu-tudomija-ganobekever-jajazijepupemet.pdfIn PDF document text
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/vifugagukekelum-buwaguxeko.pdfIn PDF document text
    • https://zelubofiwexuf.weebly.com/uploads/1/3/4/2/134234915/dekoxudane_japose.pdfIn PDF document text
    • https://fexedewikefitug.weebly.com/uploads/1/3/2/6/132681233/597313f80a6df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446155/normal_601b2c65c5923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412570/normal_6018335710d68.pdfIn PDF document text
    • https://sosijujanakuf.weebly.com/uploads/1/3/5/3/135387992/nakokamunu-vasusapikim-wukazabiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495976/normal_5fdebcbec89a9.pdfIn PDF document text
    • https://kelurefuvaw.weebly.com/uploads/1/3/0/9/130969237/8646c575ba2885.pdfIn PDF document text
    • https://kixakusafi.weebly.com/uploads/1/3/4/8/134891224/5597597.pdfIn PDF document text
    • https://kixifosesezor.weebly.com/uploads/1/3/3/9/133998007/7164016.pdfIn PDF document text
    • https://tiruvodeg.weebly.com/uploads/1/3/4/8/134892329/lolumukisasufij.pdfIn PDF document text
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/479e27bc95fc.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/nevovumowa/android_store_apple.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/aathi_video_song_from_kaththi.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/annamayya_telugu_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/71437665985.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_off0000c069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC069 5616 bytes
SHA-256: 02347b2829f7f690da9bd4d75501249ccd49bcec48eb8dc489771849fda4156b
font_01_sfnt_off0000d360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD360 10840 bytes
SHA-256: eb6d180387a16bc407cd53824e5729cd551710efe9b7d1d669a9426263c94ca9

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