Malicious PDF — malware analysis report

Static analysis result for SHA-256 1038e010834f97cf…

MALICIOUS

PDF

80.7 KB Created: 2021-01-26 10:47:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: fa5543f0310a90b33adbf077059b422c SHA-1: c17e905c0c9dbfe122c6c265385093a6eb085c18 SHA-256: 1038e010834f97cfe393644dcaa86ae0e97f151c3327081a4b5279d878a9235c
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards the use of embedded JavaScript for malicious redirection.

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
  • 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://maypoin.ru/aws?utm_term=format+of+writing+a+report+with+example PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387715/normal_5fd06455b4aee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501998/normal_5ff958fb65aea.pdfIn PDF document text
    • https://sevujixosatanin.weebly.com/uploads/1/3/5/3/135316334/323ce7d48b9f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385417/normal_5fea1ef36c54d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410702/normal_600bca48dcd0a.pdfIn PDF document text
    • https://cdn.sqhk.co/konanetufuda/jje8ZxJ/venus_flytrap_facts.pdfIn PDF document text
    • https://pebawozo.weebly.com/uploads/1/3/4/8/134865175/zepilorunaxu.pdfIn PDF document text
    • http://qwertyujg.xyz/42039616068ry6nz.pdfIn PDF document text
    • https://cdn.sqhk.co/wemegofuk/fjjiejd/43944616761.pdfIn PDF document text
    • https://kaxorude.weebly.com/uploads/1/3/4/0/134095875/xopituzawi.pdfIn PDF document text
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/muxevexejewijopide.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/jeDLXgc/national_geographic_magazine_2019.pdfIn PDF document text
    • https://fometixivoros.weebly.com/uploads/1/3/1/6/131637143/9891875.pdfIn PDF document text
    • https://cdn.sqhk.co/kugorazig/xENWhgd/dalivonefesogenefotubok.pdfIn PDF document text
    • https://mexobuvuxe.weebly.com/uploads/1/3/4/3/134369937/8075486.pdfIn PDF document text
    • https://vovasodakujex.weebly.com/uploads/1/3/0/8/130874601/sazabojo_libaxepiguw.pdfIn PDF document text
    • http://modernstyle.pro/how_to_use_moneygram_app_to_send_moneyij260.pdfIn PDF document text
    • https://dimegowogox.weebly.com/uploads/1/3/3/9/133999821/7186993.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_off0000f12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12B 5040 bytes
SHA-256: c57b921467b02e492370dad0f7f685ffc5456af0f8750051a941574ef99cc11b
font_01_sfnt_off00010232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10232 10800 bytes
SHA-256: 5f922fd58451331b521a68456b955657286f967b61db8f2d615244dd38998671
font_02_sfnt_off00012724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12724 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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