Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0154c7421231f6…

MALICIOUS

PDF

76.4 KB Created: 2021-02-19 04:17:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3f91b2ed23af5a54ef1910d3a2e78f80 SHA-1: 5f5ece515b71aa109954400ce2fd145315c48e2d SHA-256: 2f0154c7421231f6f792d816b4af8193a7d531997db2016605e6c5d8646111fa
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://baarspo.ru/wix?keyword=campbell+hausfeld+power+washer+user+manual PDF link annotation
    • https://cdn.sqhk.co/tipefimex/ijheChj/61756722891.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/giPgeHg/charlottesville_park_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/hbtT9hh/mozasimonanotatazawiwep.pdfIn PDF document text
    • http://silvanozito.online/72230021386k87wo.pdfIn PDF document text
    • http://eurofamily.pro/value_education_in_hindiygb1t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_5fda7ec73a3b1.pdfIn PDF document text
    • https://cdn.sqhk.co/xabiximakef/jfHuhgi/uppercase_e_with_accent_mac.pdfIn PDF document text
    • https://zaporori.weebly.com/uploads/1/3/4/1/134131460/fisoziwomasalaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465145/normal_6019bf7034d1e.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/ji1mJou/86076188589.pdfIn PDF document text
    • http://habirovradik.ru/31351522369x7zr.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopiroxab/eEEzjgi/turbo_drift_cars.pdfIn PDF document text
    • http://yblda.fun/13258004219m52gk.pdfIn PDF document text
    • http://betmoy54.com/godkar_pathology_book_free_download7nud0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385235/normal_5ffb985e28f71.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/ghhijjf/rekeluziwuxumanikofara.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ee4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4C 5420 bytes
SHA-256: af080245f0462d169ad6bebc763323b162a92b430280760d70c6a2e1b9b90a9d
font_01_sfnt_off0001008f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008F 10472 bytes
SHA-256: dfcf4476ee9e9f1c569779e879bf8d48bf2efaa10da374328fa32244fa93cb10