Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1e9a7e177a8168…

MALICIOUS

PDF

86.2 KB Created: 2021-02-19 10:51:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: fdb1b46c70fc8521a6752471edd50de2 SHA-1: c3245e553b3cfd6e9c95420d6b36c53afb6f2508 SHA-256: 0a1e9a7e177a81689db0ef6b6549f6f6f821394e608740496a024c42b5c53d19
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting, indicating a link farm for SEO manipulation or to distribute malicious content. The presence of a link to known malicious redirector infrastructure further supports a malicious intent. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to lead users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=dbt+for+clinicians In PDF document text
    • https://cdn.sqhk.co/nuroteditu/gjXBgjb/word_swipe_games_free.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/jeidvjh/conqueror_s_worldbreaker_regalia.pdfIn PDF document text
    • https://vojerured.weebly.com/uploads/1/3/3/9/133999986/5910506.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446638/normal_600401bb36456.pdfIn PDF document text
    • http://therarbooks.com/jetuxagovujufudodg3dh2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489716/normal_5feb5f5ee0b50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384835/normal_602f1eb95e78d.pdfIn PDF document text
    • http://xxlmature.site/puleweradodidage8sjcn.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/eOK3vge/amazon_gold_earrings_studs.pdfIn PDF document text
    • http://organicnu.info/fichas_de_consejo_tecnicojfh34.pdfIn PDF document text
    • https://cdn.sqhk.co/tinupolureg/mFGthed/dungeon_defenders_survival_map.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/Jjg1hdk/rotten_to_the_core_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/kuderoxuz/bUhcajj/mechanics_bank_auto_loan.pdfIn PDF document text
    • https://bejeselujolir.weebly.com/uploads/1/3/1/3/131379719/016068b3f066c07.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/CjeBVjb/modern_furniture_designs_for_living_room.pdfIn PDF document text
    • https://cdn.sqhk.co/jigotove/4yjagjZ/29476161401.pdfIn PDF document text
    • https://cdn.sqhk.co/jofutagi/hfijzH8/wivaretokini.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
    • 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_off0001076f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076F 4684 bytes
SHA-256: ce4774f6d66b227f7e2efc3d89ae68ccc41b09a41aa1345c7b669f90d56907ad
font_01_sfnt_off00011755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11755 11156 bytes
SHA-256: 48b080e2ce12271ac3652bb7cced6f9e9235039333b25cbce63f71e8f8458b20
font_02_sfnt_off00013d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D88 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.