Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22e01a6d826e80b…

MALICIOUS

PDF

79.1 KB Created: 2021-06-09 11:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 79adf926d1abe975f3aa3052e96fcb72 SHA-1: 4a9cdf60d88e2cc9eaad22b0b25907038f3fe80a SHA-256: f22e01a6d826e80b4f521327da25f62f7240d32cba196cfee54a398c151babf9
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The primary URL, 'https://queure.ru/pbw?utm_term=gta+san+andreas+obb+apk+1.08', indicates a lure for game-related downloads. ClamAV and ML classifiers strongly indicate maliciousness, consistent with a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://queure.ru/pbw?utm_term=gta+san+andreas+obb+apk+1.08 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477635/normal_602ee47ac87da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476768/normal_5ff3e628b7ce2.pdfIn PDF document text
    • https://rijigajigife.weebly.com/uploads/1/3/1/8/131856487/bulibasaviz_maveg_waletudasex.pdfIn PDF document text
    • https://gedenotovet.weebly.com/uploads/1/3/1/3/131379555/ea64f30f26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380213/normal_600089c92b432.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505102/normal_5fe4182230106.pdfIn PDF document text
    • https://dowazulipogopu.weebly.com/uploads/1/3/4/3/134322731/d1385423511a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450502/normal_601bcfd1c0435.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/e2247468-978f-41b8-b77c-e6d064a1bbc3/wutejujesuwefagok.pdfIn PDF document text
    • http://zusemivak.pbworks.com/w/file/fetch/144626580/where_do_i_enter_1099-oid_in_proseries.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21de9fb3-f341-49d3-b456-62d46ee25978/verifone_commander_school.pdfIn PDF document text
    • http://mizunebapod.pbworks.com/w/file/fetch/144802500/is_the_a_hush_part_2016.pdfIn PDF document text
    • http://pexovobef.pbworks.com/w/file/fetch/144780036/35065418120.pdfIn PDF document text
    • http://gabumur.pbworks.com/f/can_you_edit_a_bank_statement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82ac2dae-f424-4ddf-a4ad-a9297cce621a/82182653230.pdfIn PDF document text
    • http://zipiwume.pbworks.com/w/file/fetch/144543963/bobowomuvafunotidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d86be1eb-6af6-430b-bef9-a324c4ad1d08/94046928207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7daadf90-de79-4482-be42-31c9cdc8b483/mtd_snow_blowers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84ecfc0b-f584-45c7-ade9-13392bb90168/puvuwejuxumenasokig.pdfIn PDF document text
    • http://voveras.pbworks.com/f/how_to_get_free_xbox_360_gold_membership_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7e04f52-0aaa-4d3d-98c4-66c2c353dc87/fulegubulilikikaxugotusin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc115048-6b15-4eb8-af3b-49f27fbac2a4/punjab_govt_benevolent_fund_form_download_2020.pdfIn PDF document text
    • http://zabodovojif.pbworks.com/w/file/fetch/144426162/lukeref.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_off0000f2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F4 5576 bytes
SHA-256: 5ac313d454acb992015cd9857bab80847db5f4a17d0587f5c4ce5e99f01d81d5
font_01_sfnt_off000105fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FE 11896 bytes
SHA-256: f9286df8be1af4736219dffec5df0a50e48d8fc02ec06057060d4684b356fa10