Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e02a3c8a6b2023…

MALICIOUS

PDF

79.1 KB Created: 2021-03-23 01:20:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 557d24bf1a5ffb9ba45cf4386e9ddb59 SHA-1: 222a1c24a007cd4241bafd62e1169dcdc2c57af6 SHA-256: 19e02a3c8a6b202383d3a83745e5c137b3b0d2639f266a4be8ad835e76d39596
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to trick users into clicking through to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://bologen.ru/award?keyword=mockingjay+pdf+read+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5fe821f6d26af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409616/normal_6000ecce01ec8.pdfIn PDF document text
    • https://cdn.sqhk.co/zimidenex/hjdhrWA/27736518729.pdfIn PDF document text
    • http://zezasarasojid.mywebcommunity.org/cervicitis_cronica_tratamiento.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381539/normal_6056eb762ae5e.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/N68jaid/battle_royale_cool_fortnite_wallpapers.pdfIn PDF document text
    • https://cdn.sqhk.co/jilowepe/uM9QVjg/jivarugivepizukob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417422/normal_6056ee8c689eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475737/normal_5ffa24a6d469e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474471/normal_6010fec137c3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473053/normal_6047558ba6bcf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419225/normal_5ffb2e9b7bf98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421474/normal_602239866c858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413362/normal_60270debf3ef4.pdfIn PDF document text
    • http://jomikifu.medianewsonline.com/33944273916.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/schwinn_spin_bike_for_sale_melbourne.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489730/normal_5feedf0198d5f.pdfIn PDF document text
    • https://cdn.sqhk.co/lexelinowe/jhGSGGP/majifarunogali.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/taco_bell_hard_shell_taco_nutrition_facts.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/6306316301.pdfIn PDF document text
    • http://xenezipulugiji.atwebpages.com/25394385871.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/42419750238.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/bodycon_dress_pattern.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/how_to_thread_a_kenmore_12_sewing_machine.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_off0000f8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F4 5392 bytes
SHA-256: ee48afd1730bc70d5d6c560ee3a4eff5cf966d1b7b06890c309d1451daa1ac55
font_01_sfnt_off00010b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B83 10420 bytes
SHA-256: a6edc2b8defdba855af7d8d5c9672abfbb6cad1a9d4d2b8dab51e10972f107c6

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