Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce6b96dd1a0568a…

MALICIOUS

PDF

71.7 KB Created: 2021-01-05 19:52:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 33b27436b81c35894081f6cfe28248bb SHA-1: e25755878c82de0e17fa2883e3410eb0b772e22d SHA-256: 1ce6b96dd1a0568afb492d93ce79d344feb2eb7b6d5a4fcc492b7d17637c44fe
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one URL pointing to 'traffking.ru'. The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of numerous external links suggests an attempt to redirect users to potentially malicious sites, possibly for phishing or SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/aws?utm_term=annamalai+tamil+movie+songs++masstamilan PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403563/normal_5fac5ee14dc23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5fd15b3fb9adf.pdfIn PDF document text
    • https://pusiruse.weebly.com/uploads/1/3/4/7/134717846/7557628.pdfIn PDF document text
    • https://bisojobiregabo.weebly.com/uploads/1/3/4/5/134509607/7417752.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xizaxamuxive.pdfIn PDF document text
    • https://gekilatati.weebly.com/uploads/1/3/4/3/134378061/magovugilari_xukozodi_kotovesopuxax.pdfIn PDF document text
    • https://lularufopit.weebly.com/uploads/1/3/5/3/135326527/dokalivex.pdfIn PDF document text
    • https://kilejotiwig.weebly.com/uploads/1/3/1/4/131406519/9661115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408987/normal_5fd36cacab070.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417675/normal_5fc3d4e7d560e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_5f9c8c53f2981.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501770/normal_5fe536d256eac.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://s3.amazonaws.com/solonebosop/beco_baby_carrier_gemini_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/1080p_hd_tamil_dubbed_movies.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_off0000d125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD125 4748 bytes
SHA-256: 64fa3802a6c068ea93b87911f23a31b75e6e1dc78d97ea88d75262ba95562c90
font_01_sfnt_off0000e130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE130 10228 bytes
SHA-256: 97968cc0e55a994887cfd3ad0e632fe7e3d4d8f5e4587a06a1f28059b4e7e3d1
font_02_sfnt_off000103ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103ED 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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