Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cdfcf503d959313…

MALICIOUS

PDF

70.0 KB Created: 2021-02-14 02:48:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c247314ad96a39a56b502049400d6f82 SHA-1: 795b1424aee021fd000b958997cf41e717c0ae97 SHA-256: 9cdfcf503d959313c6746e70d1f7ae4ef7f9571e4bcce8d6c39d83963a199f9b
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 flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing or trojan variant. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The PDF itself appears to be a lure, possibly related to search engine optimization or content farms, to drive traffic to these external URLs.

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://jacksth.ru/wix?keyword=sumerian+votive+figures+characteristics PDF link annotation
    • https://nokajavu.weebly.com/uploads/1/3/0/9/130969653/bemapobuludabutolon.pdfIn PDF document text
    • https://zowamuzifam.weebly.com/uploads/1/3/1/1/131163536/2198977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456140/normal_6014f50fed619.pdfIn PDF document text
    • https://vokubopupabilu.weebly.com/uploads/1/3/4/6/134691430/9240633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427780/normal_601b8e7dcb498.pdfIn PDF document text
    • https://ronunafo.weebly.com/uploads/1/3/1/8/131856498/6752003.pdfIn PDF document text
    • http://gitamoravazini.22web.org/vubezeg.pdfIn PDF document text
    • https://cdn.sqhk.co/zunezafi/TrhcieX/sky_gamblers_storm_raiders_2_apk_obb_download.pdfIn PDF document text
    • https://vamubediva.weebly.com/uploads/1/3/4/9/134901044/4007696.pdfIn PDF document text
    • http://fodokimi.22web.org/tujhko_bana_karke_le_jayenge_video.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/hfsvSRe/72517665953.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390660/normal_5fd8e596973a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480732/normal_5fe5a637c5173.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/idjcjMr/27310119283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388063/normal_6026fa794216f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roxunir.epizy.com/avatar_full_movie_filmyzilla.pdfIn PDF document text
    • http://xeziribosivamis.epizy.com/22342353440.pdfIn PDF document text
    • http://fabonek.rf.gd/76194329900.pdfIn PDF document text
    • http://bamasagure.epizy.com/64713025957.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_off0000d61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61B 5424 bytes
SHA-256: 06931c010943c0f09d146bcfc1973e3790df8d31dd0bd3834bde3f2a810289fc
font_01_sfnt_off0000e870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE870 10064 bytes
SHA-256: af36206607d538cc0aaeb846e08124c2e8374d7ccec6bfe9b560df9907c07573

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