Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3392c2cf528cd76…

MALICIOUS

PDF

61.6 KB Created: 2021-02-17 21:38:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: dc61ce7a5baf826d9feb5d4ae82863c9 SHA-1: 48dc5b7e00b1779e345e7f73df88eca88d304434 SHA-256: c3392c2cf528cd7691e0f61a132fffda15c982333ef8fb44f47c390024c50371
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm with numerous external URLs pointing to other PDF documents. The heuristic 'PDF_SEO_LINK_FARM' indicates a high volume of links, many hosted on disposable domains, suggesting an attempt to manipulate search engine results or distribute further malware. No scripts were extracted, but the structure and URL patterns strongly suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/123?utm_term=dsl+light+not+on+belong PDF link annotation
    • http://onlyforyou.space/vapisibakaxaretuxoxataxezmi5vr.pdfIn PDF document text
    • https://wavenugila.weebly.com/uploads/1/3/4/8/134852162/2772422.pdfIn PDF document text
    • https://mopomavimixefor.weebly.com/uploads/1/3/1/1/131164117/896637c31727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420039/normal_5fd3a5fa6c297.pdfIn PDF document text
    • http://burolona.22web.org/15319580423.pdfIn PDF document text
    • https://bazigumaxofiz.weebly.com/uploads/1/3/5/3/135383162/nazezifobusi.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/idjbXgf/tap_tap_tap_lyrics_megan_thee_stallion.pdfIn PDF document text
    • http://5gusevshop.space/vidinesuwakivopifadopib1qnl.pdfIn PDF document text
    • https://rugepokowefi.weebly.com/uploads/1/3/5/2/135294276/dulobiza-logomemodig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383445/normal_5ffb272f7fe8f.pdfIn PDF document text
    • http://bupro.asia/road_rage_definition_espanolkq6kb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473947/normal_5fdd696b92ebd.pdfIn PDF document text
    • https://vedisowokiwovos.weebly.com/uploads/1/3/4/7/134767265/nidegiv-gixenovejumulir-xiruxabij-niperogarana.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/borodijugekukivunomux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pelewonaxiguso.epizy.com/pebinatomakonarak.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7DB 4780 bytes
SHA-256: 3d0f5b2bffb01c672f2aea2d92ea84cb62f04f50d16e94987b79fee3f47d3b82
font_01_sfnt_off0000c825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC825 9736 bytes
SHA-256: 8f40bc1e5d16592b51acc718dd24a8417fc94d6b90a1dab4a547062b25883cd9

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