Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ba1e4190d247fe…

MALICIOUS

PDF

75.5 KB Created: 2021-03-13 23:44:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 55c59252fdb23c2303419857dfe3da1e SHA-1: 560e780e9191f2d5eb5bffa99bbd37f00ecb8802 SHA-256: 93ba1e4190d247fe257c4ee35612220892fd350b532f5bc756ff6773512cbd5d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing and scam operations. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and the presence of a URL like 'https://gimoguvi.ru/wix?keyword=reiboot+pro+free' suggests a lure to a potentially malicious site. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://gimoguvi.ru/wix?keyword=reiboot+pro+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485448/normal_5ffd719041bf2.pdfIn PDF document text
    • https://cdn.sqhk.co/tubawonidas/ihijyjh/38265708578.pdfIn PDF document text
    • https://cdn.sqhk.co/jemajujo/hajh7jd/xepabafirezumojalewule.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465133/normal_5fefcd45acfa7.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/jg2iiih/golf_clash_tommy_pro_wind.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486969/normal_5fd22d54dafe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_6033f37d2461a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394071/normal_5fe27d23afc24.pdfIn PDF document text
    • https://cdn.sqhk.co/ledumixifer/Tr3RjaT/93049928891.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387811/normal_6000b3ce69c06.pdfIn PDF document text
    • https://cdn.sqhk.co/bezorufuv/jejfhjc/53856415740.pdfIn PDF document text
    • https://cdn.sqhk.co/jujadiziga/bcAidz3/direct_general_online_quote.pdfIn PDF document text
    • https://cdn.sqhk.co/xopigotax/dbieiiw/u_king_punch_bag_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391314/normal_5fe7728f7a4cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484612/normal_60278334e23f0.pdfIn PDF document text
    • https://cdn.sqhk.co/botonerepap/eheibhh/97903529156.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479933/normal_6032720d524eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415543/normal_5fde059c2baca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://79c9c32e-6572-42fd-9c0e-61d057d48a34.filesusr.com/ugd/33a1c8_532b8f401bd94dca8eb4773fdc3130c3.pdf?index=trueIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_f3c519b8a1944e93abe3a513a7721149.pdf?index=trueIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_27e1d6df0f52459e9c620d728e8ada6c.pdf?index=trueIn PDF document text
    • https://044ec7df-721b-4788-b209-87474a3fcb06.filesusr.com/ugd/60ffa2_1b42a838a67740e38112df15138581bd.pdf?index=trueIn 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_off0000e02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02C 4624 bytes
SHA-256: 92a4bc3a3117d3eb8865c2a80c7b166f3811169a178a5b4c32f11b94666b1a44
font_01_sfnt_off0000effc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFC 15232 bytes
SHA-256: f1bf3e7ed08d8e47395d43c8fbaaa1370841c3ca27222fdf863ae8b07a4f0ed8

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