Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc24ea29aca441d…

MALICIOUS

PDF

62.4 KB Created: 2021-02-04 07:41:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: af4f9c135f0f0688353f91586ad45cfa SHA-1: 00fbb5d2c864a8dbc93128ac56d0dac569f31320 SHA-256: ecc24ea29aca441da25d142a590553a550aaf5f0d2d167ba6ce15c0c064464f3
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. The document contains a significant number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. While no scripts were directly extracted, the presence of numerous external URIs suggests an attempt to lure users to external sites, likely for phishing or malware delivery.

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://baarspo.ru/123?utm_term=town+hall+3+base+setup PDF link annotation
    • https://cdn.sqhk.co/parapirer/jvPifji/my_ipad_calendar_events_are_gone.pdfIn PDF document text
    • https://cdn.sqhk.co/mivijigonof/QUicjgO/fastest_drift_entry.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/ib1hjNt/control_center_ios_14_home.pdfIn PDF document text
    • https://cdn.sqhk.co/vozeseseber/9hdEjgw/hangout_gulf_shores_closed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383572/normal_5fde3e6cc21b5.pdfIn PDF document text
    • https://cdn.sqhk.co/migazajigum/hgvhisM/46222001773.pdfIn PDF document text
    • https://cdn.sqhk.co/jabuvilir/fjdWYdJ/88853412113.pdfIn PDF document text
    • https://wopirizebopate.weebly.com/uploads/1/3/1/4/131452778/womiveze.pdfIn PDF document text
    • https://cdn.sqhk.co/moxulofilose/gejchf7/ocean_first_merger.pdfIn PDF document text
    • https://vokarojunez.weebly.com/uploads/1/3/2/6/132696330/7719146.pdfIn PDF document text
    • https://gefererasixo.weebly.com/uploads/1/3/4/7/134749514/0ff60a78ca04fe.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/lusiwituzemusugo.pdfIn PDF document text
    • https://pebarefilegiz.weebly.com/uploads/1/3/5/3/135325086/2054956.pdfIn PDF document text
    • https://nuvawusop.weebly.com/uploads/1/3/5/3/135302159/940963954f6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://delenujafoxa.rf.gd/74914372385.pdfIn PDF document text
    • http://ralopokizuneza.rf.gd/lidajapabenokisi.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_off0000b9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9F0 5156 bytes
SHA-256: 3f6fc522ec2b6d6bd2b322e4ec22614042e3573385a520a1dbc170bf089881fe
font_01_sfnt_off0000cb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB89 9860 bytes
SHA-256: c838d018883e0ae271fea1fe4e3961e05a1043596a077260a49a90d08300da48

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