Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca18a4ee6bd68a2c…

MALICIOUS

PDF

102.5 KB Created: 2021-02-03 19:51:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3ec7b91349b7ef10328ceb017ef3a84a SHA-1: f15fe139ce9e378cd7cf1ea2748a22b010dc29c5 SHA-256: ca18a4ee6bd68a2cd18cb09a4fd0ea515d3dbe55064b3b5dc82f3ffa4d5b8e7b
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains metadata related to 'Benjamin rogue .357 for sale south africa' and the wkhtmltopdf application, indicating a potential lure for illicit goods or services.

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://baarspo.ru/123?utm_term=benjamin+rogue+.357+for+sale+south+africa PDF link annotation
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/163388b3c8ed4f.pdfIn PDF document text
    • https://fugebigejajifad.weebly.com/uploads/1/3/1/4/131406613/kanaxuvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389365/normal_5fe8fbec0d865.pdfIn PDF document text
    • https://lifofokir.weebly.com/uploads/1/3/1/6/131607054/0683ecab63.pdfIn PDF document text
    • https://kabuxezalexafa.weebly.com/uploads/1/3/0/8/130814122/detovavilupi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421637/normal_5fd9fa6a9912e.pdfIn PDF document text
    • https://cdn.sqhk.co/jilebodetifa/bmghggu/yandex_browser_safe_to_use.pdfIn PDF document text
    • https://zudejafig.weebly.com/uploads/1/3/2/6/132681624/xiwonin.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwobevina/XyLQIdF/free_netflix_vpn_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475215/normal_5ff49ce3313cc.pdfIn PDF document text
    • https://pejeronasoko.weebly.com/uploads/1/3/2/6/132682646/towurujafixirene.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416500/normal_5fc7f1817b843.pdfIn PDF document text
    • https://cdn.sqhk.co/buzunonoj/UjbkXSt/kowudetabododusiw.pdfIn PDF document text
    • http://vifofumimugeke.22web.org/56143133184.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/ghjhngg/kelovefobikobi.pdfIn PDF document text
    • https://jowakalol.weebly.com/uploads/1/3/4/4/134480841/bowukisotizogej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456663/normal_5ff5fc3d31931.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401976/normal_60054195554b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408596/normal_5fddc08d97170.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wosolebaxuwutux.rf.gd/soul_worker_mobile_apkpure.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15143 5820 bytes
SHA-256: 7e3574682299aca63e5f4e4a8170b33c87de6754f9952136927c1a66d79d1c7d
font_01_sfnt_off00016508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16508 11256 bytes
SHA-256: 57b234a4c4a35cb4345e32b5163df2f06c9699e4bee3842e9f618319c68c2cdb

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