Malicious PDF — malware analysis report

Static analysis result for SHA-256 422634574520674e…

MALICIOUS

PDF

81.7 KB Created: 2021-05-30 23:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9bd459fdc4b5573e7cfeb1141e74f277 SHA-1: 8916eac0aa731a347d9842ded2592db0c6bd3f22 SHA-256: 422634574520674e00d4d3b58614be779d4c8172d77891411f151c013fed9356
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 0.9993

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://lozipotod.ru/strik?utm_term=harry+potter+and+the+goblet+of+fire+book+hardcover PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4491934/normal_5fcad407af34f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447270/normal_605dda2428e96.pdfIn PDF document text
    • https://gexaxiwiwa.weebly.com/uploads/1/3/4/4/134480231/gorobezu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371258/normal_603c0b866399d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495985/normal_5ff3234bc2d48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_605099790a678.pdfIn PDF document text
    • https://gibitomenufe.weebly.com/uploads/1/3/4/0/134041720/raxapezodolujow-nomobetewet-durosen.pdfIn PDF document text
    • https://fusopozosasotex.weebly.com/uploads/1/3/4/4/134477759/fe4abdad23aef9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374859/normal_605aa10f5a83e.pdfIn PDF document text
    • https://kowirakixodoxe.weebly.com/uploads/1/3/4/4/134467502/6608805.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450746/normal_5fee1afee0e9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408584/normal_60382e0ee5a89.pdfIn PDF document text
    • https://gapibuxox.weebly.com/uploads/1/3/2/6/132695643/zolajaloma_nopego_torugugafatup.pdfIn PDF document text
    • https://warakamaluxib.weebly.com/uploads/1/3/4/3/134378328/8672256.pdfIn PDF document text
    • https://lirobepofuneve.weebly.com/uploads/1/3/0/7/130740173/155686.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450037/normal_5ffc1f6509a51.pdfIn PDF document text
    • https://wemedasexokava.weebly.com/uploads/1/3/4/5/134512162/kixiw.pdfIn PDF document text
    • https://deperomider.weebly.com/uploads/1/3/4/3/134344929/suguvo.pdfIn PDF document text
    • https://xorozatu.weebly.com/uploads/1/3/4/4/134461248/xolavujirolufad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368229/normal_5ff40ffbaa544.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0152cfa6-0260-4801-ac27-c2672769b49c/alinco_dx-sr8t_mars_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba3b1a1-2b8c-43c9-940b-186865634b01/one_ui_apk_for_all_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd0b6601-c874-4ff9-bf21-1fd53937f5c0/advaita_vedanta_philosophy_of_nondualism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5516c52-e211-4aac-bf48-5aca69765077/xutirobubenupowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0b75564-f0ce-4993-8104-3a85e66d9734/pebutegibakix.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_off0000fb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4D 5564 bytes
SHA-256: cfc1c9fb45bc4667661138062e95a36a67456cac7175c5284db1faa9d9d07342
font_01_sfnt_off00010e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E46 13052 bytes
SHA-256: 1340ce53ebdf6f5f465aeb4e9e0ec9e72f50143876ecaa309d60f15bbd2104ee