Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa010ec1677882a1…

MALICIOUS

PDF

75.9 KB Created: 2021-03-03 02:57:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: bee84c9860b312f0eced47d5210a14d3 SHA-1: 3d15f9163d49250f51590f7e9e4759d7be3f3463 SHA-256: aa010ec1677882a18850ba6b8e995a5b0152b680a80d52a5f31be17db6888b93
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The heuristic firings and ClamAV detection indicate malicious intent, likely to redirect users to phishing or malware-hosting sites. No scripts were extracted, but the PDF structure itself is used to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/123?utm_term=julius+caesar+act+1+scene+3+important+quotes PDF link annotation
    • https://xadixifiv.weebly.com/uploads/1/3/4/8/134888816/mivalelegadabamafol.pdfIn PDF document text
    • https://gimipozadifan.weebly.com/uploads/1/3/1/3/131380487/7841636.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448986/normal_6001c29d540bb.pdfIn PDF document text
    • https://tipuvativojodud.weebly.com/uploads/1/3/4/7/134754547/kavalemodomejan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448558/normal_60218d9903ffa.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/2f3a97a3e574d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467322/normal_5fd7bae2a2717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392877/normal_603e77856e90d.pdfIn PDF document text
    • https://gojupisot.weebly.com/uploads/1/3/4/0/134016698/3735053.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452382/normal_60291d74d436d.pdfIn PDF document text
    • https://jetizapu.weebly.com/uploads/1/3/4/3/134371104/3ebd78b28bec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480749/normal_5fec2a5193c6a.pdfIn PDF document text
    • https://baxomowimesadud.weebly.com/uploads/1/3/5/3/135303612/kovuzemawav_sopazosavok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486965/normal_60102a12533a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_601b524c16def.pdfIn PDF document text
    • https://cdn.sqhk.co/detatakev/X1c0pic/wifi_signal_strength_meter_pro_no_ads_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461516/normal_603a525e4626c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477864/normal_5fd9be36846a7.pdfIn PDF document text
    • https://bojufare.weebly.com/uploads/1/3/1/0/131070992/fb80fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408478/normal_5fe09777e0ce7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450242/normal_5fe083670d1a9.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_off0000ea96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA96 5412 bytes
SHA-256: f7819eac3bf7d00218ffa22a47754eebba21d686b48904ba14c4edc1ff3c92dc
font_01_sfnt_off0000fcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF0 10940 bytes
SHA-256: 57ca34f92acb1fbf9b5c83a810c3e928c45a970ce8bb5f7f74b75f0c7f760a9d

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