Malicious PDF — malware analysis report

Static analysis result for SHA-256 0460f6bab03a4cab…

MALICIOUS

PDF

81.6 KB Created: 2021-03-08 07:14:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bc59490bd628e81aeacfd23aa641879c SHA-1: 817997128226eb81f7f1056bcf33cc3920a0a15b SHA-256: 0460f6bab03a4cabe21461acc39bf21ef8e8f828e5cf11bc2830183c7258652c
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, appears to contain keywords related to motorcycle specifications, likely intended as a lure. ClamAV and ML heuristics confirm maliciousness, with the PDF_SEO_LINK_FARM heuristic indicating a mass of external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://zajinet.ru/wix?keyword=yamaha+v+star+1100+specs+2005 PDF link annotation
    • http://fruitik.space/87473984168uggi4.pdfIn PDF document text
    • http://rowomonug.mywebcommunity.org/lewis_structure_practice.pdfIn PDF document text
    • https://rojofasefimo.weebly.com/uploads/1/3/1/6/131636828/623199ae69b8a.pdfIn PDF document text
    • http://theporte.xyz/jogilusawagezave4iqo.pdfIn PDF document text
    • https://nunevebola.weebly.com/uploads/1/3/4/8/134846747/ponifewafore.pdfIn PDF document text
    • http://fresh-ita.fun/krotov_physics_book_downloadf5jtw.pdfIn PDF document text
    • https://wegoboxup.weebly.com/uploads/1/3/4/7/134772399/ee2abc2307.pdfIn PDF document text
    • http://bopolubolef.mywebcommunity.org/barrons_gre_22nd_edition.pdfIn PDF document text
    • https://ranemexamegen.weebly.com/uploads/1/3/4/4/134440137/diwit.pdfIn PDF document text
    • https://gitarufimoka.weebly.com/uploads/1/3/4/2/134235546/tiwilirizawosek.pdfIn PDF document text
    • http://vexezujuzas.scienceontheweb.net/xedijimadapojagizapos.pdfIn PDF document text
    • http://sallely.xyz/why_are_clothes_not_drying_in_dryer7wzmy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5176fe7d-5fb8-470f-9f87-0b5421892795/92116998991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb37d298-78d0-4323-8cae-884bf218beb9/why_is_my_pellet_stove_blowing_cold_air.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bcaa249-bf00-4ee3-8a84-3a79aa024ff9/45961856383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c0449bd-4fc1-4268-9fb0-4ccfef90964c/the_vampire_diaries_the_awakening_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d228bab1-0a32-4d50-9e11-ab8e0bc453c5/old_ariens_snowblower_carburetor_adjustment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1057250d-caa8-4aa3-b40a-3857f2d54401/camilo_y_evaluna_se_casaron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f79472-7ec4-4ecc-91ab-557df2f8e71b/a_cuanto_equivale_una_hectrea_en_metros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b63df9ce-cc2e-4b6b-b80e-7a319f02f37a/410438533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38bb1d0d-8e0d-42f2-ab13-51e5fbf8a034/dieta_de_los_30_das_disociada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a74bdfab-61c4-4e86-a8ee-6fa070c3ebec/70944700950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c37a829a-b3a1-430b-89b7-6ced60663d6e/kukadaluzaved.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7163052a-68cb-4773-8d52-dc1d65fc00dd/danexajevutexugo.pdfIn PDF document text
    • http://vibirokudod.myartsonline.com/34945324964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07fc6390-fc5c-4618-bf9d-a84d72f2259d/poxifemidenotababatesuj.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_off0000f103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF103 5136 bytes
SHA-256: e1ddac4ad83529357d7d43c2c72c43b691af458da6f49dacf92f802bec6a8ddb
font_01_sfnt_off0001027d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027D 11236 bytes
SHA-256: f5534e5e7737c18b610427119651ac2dbeaae56ee78d222740ebe47fecc8f686
font_02_sfnt_off0001289b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361