Malicious PDF — malware analysis report

Static analysis result for SHA-256 29cad8d7d46331c0…

MALICIOUS

PDF

75.0 KB Created: 2021-02-28 05:15:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d8a62dff1b2ce5a9b2f9e64650526a24 SHA-1: ae2d10f5ff2acc8508d73a3b4f3955eee1692dfc SHA-256: 29cad8d7d46331c052235649662bfe9b0e749d80085221d9354bf2c6763822e5
186 Risk Score

Malware Insights

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

The PDF contains numerous external links to disposable domains, a technique often used for SEO manipulation or to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/wix?keyword=armada+magazine+pdf PDF link annotation
    • http://xogunajeraxuda.mywebcommunity.org/mary_shelleys_frankenstein_movie_ending.pdfIn PDF document text
    • https://ravuripuzi.weebly.com/uploads/1/3/5/9/135958818/8571297.pdfIn PDF document text
    • https://wesedujixezibo.weebly.com/uploads/1/3/1/6/131606467/rasiso_gijuw_todamoji.pdfIn PDF document text
    • https://pexafibilo.weebly.com/uploads/1/3/4/4/134484824/0de00f6570c5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491412/normal_602d74ca3f86c.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/sisowonu.pdfIn PDF document text
    • https://koruguliduni.weebly.com/uploads/1/3/4/8/134896859/9520467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418987/normal_6014bfb592a1f.pdfIn PDF document text
    • http://vizilirudigub.getenjoyment.net/8326801961.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427501/normal_603afcbb89c6c.pdfIn PDF document text
    • https://bogezemobazuv.weebly.com/uploads/1/3/1/8/131856224/nevoxidijel.pdfIn PDF document text
    • https://jusodizepo.weebly.com/uploads/1/3/1/0/131070216/ffb9ebccc3c.pdfIn PDF document text
    • http://rirenanevigi.22web.org/dajaguxan.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/how_to_make_my_lg_tablet_run_faster.pdfIn PDF document text
    • https://dupudebokuvufex.weebly.com/uploads/1/3/2/3/132303235/vanoduwakuxumaraw.pdfIn PDF document text
    • https://sozazoje.weebly.com/uploads/1/3/1/1/131164180/xukop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418993/normal_5fe0d10878928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500910/normal_5fd9f3dec9d87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sonisan.epizy.com/74089228433.pdfIn PDF document text
    • http://wunenonasudir.rf.gd/why_is_my_rca_tablet_running_slow.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_off0000ea25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA25 5192 bytes
SHA-256: e39d8b0dd44c9e0d209d96ca6dc884f544752a0a2436079326c19630e31958df
font_01_sfnt_off0000fbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC0 10384 bytes
SHA-256: 2b22b73e272882c39346a56d447092c67536eed60009e4d757273fbc26873e25