Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9fd6767b6d068ef…

MALICIOUS

PDF

74.3 KB Created: 2021-01-10 04:05:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fd26dcaee265d9f9553c5c95fdd3c3f1 SHA-1: 97194b9bb47ed495d192c02935626afd25f887d9 SHA-256: b9fd6767b6d068ef7f95f7e79ca36e6de000b91fee33eba78d00f4cd2c83a305
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to obscure the ultimate download destination. The presence of a 'download' button heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafficel.ru/aws?utm_term=able2extract+professional+14+free++with+crack PDF link annotation
    • https://site-1177944.mozfiles.com/files/1177944/jojetedu.pdfIn PDF document text
    • https://site-1178729.mozfiles.com/files/1178729/fowidipifaxalabikinax.pdfIn PDF document text
    • https://cdn.sqhk.co/lamijaluxeso/dhftibR/56430354763.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/rqgyjhQ/3401762250.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387241/normal_5ffa5c6e6a49d.pdfIn PDF document text
    • https://pudasebedizut.weebly.com/uploads/1/3/4/5/134587980/binapojurufiwafet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390385/normal_5fda838a0a4c5.pdfIn PDF document text
    • https://site-1209772.mozfiles.com/files/1209772/twistee_treat_clermont_hours_of_operation.pdfIn PDF document text
    • https://dugilosokufaku.weebly.com/uploads/1/3/4/6/134610324/bubozeta_kalaz_jakitevuzetud.pdfIn PDF document text
    • https://jugijivarute.weebly.com/uploads/1/3/4/6/134620481/15a48147b.pdfIn PDF document text
    • https://gumevuwogixuxuj.weebly.com/uploads/1/3/5/3/135317748/9256075.pdfIn PDF document text
    • https://lelobetiladafan.weebly.com/uploads/1/3/4/4/134497055/2160243.pdfIn PDF document text
    • https://zozisumuwukow.weebly.com/uploads/1/3/1/3/131380825/947351.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/jaggtgd/wekivukevifafeditofaw.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/iTrFWjf/zexegejamigetivutudajav.pdfIn PDF document text
    • https://site-1166601.mozfiles.com/files/1166601/42102989655.pdfIn PDF document text
    • https://lowunidedalovel.weebly.com/uploads/1/3/1/3/131380213/20d571.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34D 5728 bytes
SHA-256: f370b4451b19fb48cd1822a700f694763ade2b40de5ca16e33c8de80edb6a92a
font_01_sfnt_off0000f6ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EC 10800 bytes
SHA-256: 01c76075923206235a3be2fb36c5b08052cde98c0364077592d191c45b98bb15

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