Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12468f2044fe636…

MALICIOUS

PDF

81.1 KB Created: 2021-03-28 00:26:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1afd42bb01f2864b48bc0393a0bcfaf5 SHA-1: c60638fd41c1f36216d37977e6965ec8ff2a4db0 SHA-256: f12468f2044fe636dde96a49fd5de6b93f2a946f24426eb26182e55c9c71d639
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and 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 0.9996

Heuristics 6

  • 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.
  • 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://maypoin.ru/123?utm_term=video+maker+online+free+for+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451018/normal_5ff2aead6d81a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_603a6bb84d688.pdfIn PDF document text
    • http://onlineeshop24.xyz/nufomowovidu8ww.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/zgiS8hj/big_bang_theory_season_13_release_date.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://sefagovat.weebly.com/uploads/1/3/4/4/134402874/1300903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464297/normal_604e74b439a36.pdfIn PDF document text
    • https://godivibodo.weebly.com/uploads/1/3/4/0/134040440/tugiw.pdfIn PDF document text
    • https://gajegebukorivip.weebly.com/uploads/1/3/4/4/134487765/xuwunat.pdfIn PDF document text
    • http://copyrightprivacy.site/kong_skull_island_full_movie_mp4_downjq94.pdfIn PDF document text
    • http://scandisvet.ru/joxuputuzugiwufst2yc.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/bejogiv.pdfIn PDF document text
    • https://bixunirejo.weebly.com/uploads/1/3/5/3/135329058/e0bd0adcf.pdfIn PDF document text
    • https://cdn.sqhk.co/dakubakasilu/hhihNjf/cars_for_sale_near_me_craigslist_by_owner.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/jfgeSib/21327125702.pdfIn PDF document text
    • https://cdn.sqhk.co/zafowavo/13jhEnB/easy_ombre_nails_with_gel_polish.pdfIn PDF document text
    • https://cdn.sqhk.co/pogezasamu/6ifJ9jf/44780796137.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_ac3b4592d63546f5a1257fdf799e2f27.pdf?index=trueIn PDF document text
    • https://d23eb412-52e1-45ef-a32a-0c032022daee.filesusr.com/ugd/03485a_e7105f2ff0624a27861c5d1158f4902d.pdf?index=trueIn PDF document text
    • https://6346cca1-8be9-442e-91e0-e35201572fa6.filesusr.com/ugd/a8c077_e83fc869b83f428185ede4ad69c3a710.pdf?index=trueIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_f5fa38e6e90c4a778a61a843e92b23db.pdf?index=trueIn PDF document text
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_eaa4204c9f9249ce9fa2ff2d3360677a.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_off000100d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D6 4904 bytes
SHA-256: dbc05e7448f8cc6eb3b11111ad33ca58b198c4e0eff051546461ada05487c6b3
font_01_sfnt_off00011173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11173 11084 bytes
SHA-256: 7be92c353e4b628e48a6f5262b22fe494d2faa360409d873b09739ce8eeb07f0