Malicious PDF — malware analysis report

Static analysis result for SHA-256 d096e24d29a2ec54…

MALICIOUS

PDF

76.1 KB Created: 2021-03-25 14:28:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 9b92ad9197ccdc155f94007bd1c41ce0 SHA-1: 56c1b57ef8917ddd5c737feb0388945fdd574a92 SHA-256: d096e24d29a2ec54e544a47c486c93825d9310824c1250db24859d479cee2ffa
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a significant number of which point to disposable hosting services, indicating a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links. The document body, though heavily obfuscated, contains keywords related to search terms, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=canton+ohio+whitepages PDF link annotation
    • https://javumegibevi.weebly.com/uploads/1/3/4/6/134634398/3102616.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimurami/agi5ieI/qs_world_university_rankings_by_subject_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/viwitukaz/0X51jjw/kenya_law_reports_cause_list_muranga.pdfIn PDF document text
    • https://fegemuvu.weebly.com/uploads/1/3/2/6/132695633/5587873.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/dFr7gcb/430227428.pdfIn PDF document text
    • https://cdn.sqhk.co/xataruzepape/Uhhhcw7/goduxudiviziwabo.pdfIn PDF document text
    • https://cdn.sqhk.co/wosuzumamig/hd9ghmf/good_street_racing_cars_for_beginners.pdfIn PDF document text
    • https://jikumudepopojet.weebly.com/uploads/1/3/1/4/131453433/6899273.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_b85e1e0d85fc48fd9654cb6421f0e0e6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/983e4a61-16cb-4fa5-9290-1b8f71d2e725/how_do_you_start_a_realistic_fiction_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb92f3fb-1a84-40ed-a2e9-157db0dbd269/gexajodufezanu.pdfIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_5f569da9bb9d4699a0cd0a34d51494dd.pdf?index=trueIn PDF document text
    • https://b3d988c2-7a7d-4c3c-9141-221b6550481e.filesusr.com/ugd/9dda13_aea4231cb7af495c82edad4720175957.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/abf23d44-c689-4ff3-830e-4716f87992b2/37829224649.pdfIn PDF document text
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_297251d5dd664cbcb7d71bfd85279c32.pdf?index=trueIn PDF document text
    • https://02aee961-309f-4c8b-9790-08f12c26706e.filesusr.com/ugd/8321db_692dd560cb70428c8ae12d7adc0fb476.pdf?index=trueIn PDF document text
    • https://f4a80ce2-0a24-44e2-aff7-13c87a434ee9.filesusr.com/ugd/ace063_9709939779644f15ab79e183e5f95204.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/467386b2-4ec7-4be7-8c1e-998f1e172cdf/saxelubad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afd770b5-5266-4c72-8783-43c76c6b058e/me_before_you_movie_review.pdfIn PDF document text
    • https://30bb9d03-04f1-4043-8ca4-b11f08dd7d37.filesusr.com/ugd/82ab19_86367f911ebe4988acce7842e1f20861.pdf?index=trueIn PDF document text
    • https://6525eaf8-9a42-4119-9fb4-c3d475b3b78e.filesusr.com/ugd/80bfa9_20c626126032479e9e3e4436b9496a51.pdf?index=trueIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_0c3daace271a4ff099e883df64fae51d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9005fa5f-10ba-4510-a240-3daeaf770206/raxavujaxototoras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f547942f-a0fd-425b-977b-e3a3c66e3351/procreate_calligraphy_brush_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dca38f53-2adc-448d-b33d-d2e7e9cab22b/dayton_unit_heater_-_m_n_4lx55.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_off0000ed07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED07 4948 bytes
SHA-256: d47fd1f89ec1fdac577b0daba4c71eef6c021782639b2eb291974d6bc8d1cdf0
font_01_sfnt_off0000fdf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF5 10888 bytes
SHA-256: 70ac5fd302da715c51269f4b8627f36075abe39fbccab0039a1326bfbc125ea9