Malicious PDF — malware analysis report

Static analysis result for SHA-256 b10d2acf2908a669…

MALICIOUS

PDF

71.4 KB Created: 2021-06-06 01:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: bcdabeddee956c6d7fe8ae75b34630f1 SHA-1: de16deb9a7a44d60452710542cd119eb34d3d1d9 SHA-256: b10d2acf2908a669e4fea71ee6caf2cf5b832d6f4406b558f5206a2099fb60ef
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, one of which is `https://drafthe.ru/pbw?utm_term=flushed+away+2006+part+1`. The presence of embedded URLs and the PDF structure suggest an attempt to manipulate search engine results or distribute further payloads. No scripts were extracted, but the overall structure points to a phishing or content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://drafthe.ru/pbw?utm_term=flushed+away+2006+part+1 PDF link annotation
    • https://gowumobajakexe.weebly.com/uploads/1/3/4/5/134585768/xizar.pdfIn PDF document text
    • https://zogolobogin.weebly.com/uploads/1/3/4/6/134690222/5590186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446915/normal_6014732e75cb4.pdfIn PDF document text
    • https://ximavubakalik.weebly.com/uploads/1/3/0/7/130776508/db5bdbae2bb.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4529697/normal_60b6daa328960.pdfIn PDF document text
    • https://fovinekepug.weebly.com/uploads/1/3/4/5/134587719/6606383.pdfIn PDF document text
    • https://guvatezip.weebly.com/uploads/1/3/0/7/130776756/a6dd388ddf6af.pdfIn PDF document text
    • https://sagakoto.weebly.com/uploads/1/3/0/8/130814189/5632059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450260/normal_6010b762e458d.pdfIn PDF document text
    • https://pupaxutakigi.weebly.com/uploads/1/3/4/5/134579126/vogevimun-jevig-lopanezidalo.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/e1109106-dcca-47be-a8c7-ed183fb97459/samsung_galaxy_note_10.1_n8000_firmware_free_download.pdfIn PDF document text
    • http://xifatarege.pbworks.com/w/file/fetch/144690477/how_to_make_income_statement_and_balance_sheet_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35076135-5387-4bb2-8f5d-5c1256adc216/class_3_math_practice.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/w/file/fetch/144427962/uppababy_vista_double_configurations_with_bassinet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f14409ad-a30d-447f-9a09-97cad30053a7/best_romance_thriller_books_2020.pdfIn PDF document text
    • http://wenuveraroto.pbworks.com/w/file/fetch/144528732/1477194421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21b8e608-b04c-4020-b940-8ce7786b179b/blood_bowl_2_passing_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7162382c-af82-45f9-95ff-879a64dd8579/how_to_connect_chromecast_to_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77e35bd6-d930-47bd-b3ac-c927c757bdb8/rosetta_stone_spanish_workbook_level_3.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD129 5676 bytes
SHA-256: a964d8efb704b0e56edffadfcdefd5e2a03db05fac50321362f26b0cd1002c4b
font_01_sfnt_off0000e484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE484 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000ed12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED12 10304 bytes
SHA-256: cf4ecff92ac664c07e34eb831a48fe9632479ec0394281070b260ab0edf3fe91