Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab603a7623e3c9bc…

MALICIOUS

PDF

72.0 KB Created: 2021-03-01 08:01:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3ef15392434beab069f7f0269482c345 SHA-1: e08e2c6022248fd8a6299ce6a4204494e6049d18 SHA-256: ab603a7623e3c9bca3922ecf27c1e91fba336108c2baf23d79d93d4972d34698
186 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 ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://seumenha.ru/123?utm_term=lord+of+the+flies+meaning+beast PDF link annotation
    • https://kagivosivozavex.weebly.com/uploads/1/3/4/7/134746508/jimog.pdfIn PDF document text
    • https://kurupatasewa.weebly.com/uploads/1/3/5/9/135958836/wekonaze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481516/normal_5fe664b19084b.pdfIn PDF document text
    • http://malespw.xyz/5m_bell_tent_footprint_groundsheetmobvx.pdfIn PDF document text
    • https://vasirorikipik.weebly.com/uploads/1/3/0/7/130776585/3471849.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493867/normal_5fcdd8b7e6364.pdfIn PDF document text
    • http://mixit.info/738497444030o5ao.pdfIn PDF document text
    • https://vurikiwuguwek.weebly.com/uploads/1/3/1/4/131408439/radejo_devalulesutar_dabotademomujo_buginepadub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496381/normal_6016d20b636cd.pdfIn PDF document text
    • https://xotomunekezej.weebly.com/uploads/1/3/1/0/131070571/bavan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419633/normal_60287aa83cd8c.pdfIn PDF document text
    • https://ledajesaler.weebly.com/uploads/1/3/4/0/134041179/vatibupakoxat-fadufogudopavid-tifidelosetu.pdfIn PDF document text
    • https://tezigawoje.weebly.com/uploads/1/3/1/3/131379443/puzoni-wokumir-dekolefaditasij.pdfIn PDF document text
    • https://lidafeli.weebly.com/uploads/1/3/4/6/134683499/cc701fb3e92490.pdfIn PDF document text
    • https://tugadebijo.weebly.com/uploads/1/3/4/0/134042488/4f32cdf36.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/agjiXdA/disneyland_parks_around_the_world.pdfIn PDF document text
    • https://gimituwemowi.weebly.com/uploads/1/3/4/8/134872285/605b273f46663ce.pdfIn PDF document text
    • https://zujuwaxi.weebly.com/uploads/1/3/5/3/135307850/d0eaf449016075.pdfIn PDF document text
    • http://ebay-coupon.ru/14604347610uvh30.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_off0000dd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD09 5404 bytes
SHA-256: da1224c8fb7cefaf32526888f9a479129133ac6cf8daed6d045717324b028d64
font_01_sfnt_off0000ef3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3E 10416 bytes
SHA-256: 35e3eab6c5579cac8ebfa63eb4df67270e4b9cc9453d8d22fda3dcc22fe80ba4

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