Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1a05f54dfa93db1…

MALICIOUS

PDF

68.7 KB Created: 2021-04-03 20:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f74f35fe16cab58cc8f76f7d05470083 SHA-1: 617b76b064e99439165aea2483c1867a77727da9 SHA-256: c1a05f54dfa93db1859be42dd47261fb7247ade91d2e77a19c38e5aa16219b70
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, many pointing to disposable hosting, and includes a call-to-action phrase suggesting a download. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution. The primary URL, 'https://jottigo.ru/123?utm_term=aviator+smart+watch+manual', combined with the document's appearance as a manual, suggests a lure to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=aviator+smart+watch+manual PDF link annotation
    • https://jomefexud.weebly.com/uploads/1/3/4/7/134732593/kabiwivupiwos_matuxekuvurupe_wekifarazituzet_duzijarukavo.pdfIn PDF document text
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/4697216.pdfIn PDF document text
    • http://scandisvet.ru/samsung_dryer_dv50f9a6evw_a2_not_heatingj8zud.pdfIn PDF document text
    • https://jekosupoma.weebly.com/uploads/1/3/1/6/131637113/082c3ababb51e.pdfIn PDF document text
    • https://sanawovixib.weebly.com/uploads/1/3/4/6/134653903/medupibozo-jukeme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486060/normal_6067936d75940.pdfIn PDF document text
    • https://dadizatutelebi.weebly.com/uploads/1/3/1/0/131070904/nibilerufonumobivum.pdfIn PDF document text
    • https://sowujapureku.weebly.com/uploads/1/3/0/9/130969862/vajiweguki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412195/normal_60297d677630a.pdfIn PDF document text
    • http://fitdieta.com/vikizawezi0c4m3.pdfIn PDF document text
    • https://junafoxotoroj.weebly.com/uploads/1/3/0/7/130738975/4907878.pdfIn PDF document text
    • http://housefashion.ru/sogenabuehbdb.pdfIn PDF document text
    • http://rineset.xyz/briggs_and_stratton_450_series_148cc_blades9ycg3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_4753583d3b9042a4af77946a697baec5.pdf?index=trueIn PDF document text
    • http://vevewaxiji.epizy.com/32850072028.pdfIn PDF document text
    • http://nikejubefip.epizy.com/low_cholesterol_diet_plan.pdfIn PDF document text
    • https://665985ba-8e9f-4173-b993-17a3090d61d7.filesusr.com/ugd/08421c_acf7bc735513494bba6477a8a7c54cf1.pdf?index=trueIn PDF document text
    • https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_2a64d6eb03434d86bd635f9c5f26cc95.pdf?index=trueIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_b74d5817baeb4d44bad231bab98fce95.pdf?index=trueIn 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_off0000cfc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC8 5180 bytes
SHA-256: b50db2f6c9ad5d7241acedbfd9eebe2b04274fb4c42e57363ac08889d8bd20eb
font_01_sfnt_off0000e150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE150 10744 bytes
SHA-256: cda10a6ac3eb49a1088ae1abf5014d952c91a753a31367a33960430cad4988fb