Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabb3f3cfe563268…

MALICIOUS

PDF

71.6 KB Created: 2021-04-05 03:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b32b7e1900a0deb6c76484f0a2285b05 SHA-1: 8e4da99677083c924b32f25f6ba40b42de4fad0e SHA-256: fabb3f3cfe563268967f2b3556e0979433beea7130e6e125406adbc71e14a2a1
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically targeting 'xezojetit.ru' and a keyword suggesting a lure. Heuristics indicate it's a link farm on disposable hosting, and ClamAV identifies it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to malicious or phishing sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=batumi+map+pdf PDF link annotation
    • https://cdn.sqhk.co/vibisidumes/qighdhi/30392692218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459787/normal_60374cd8bcce3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462073/normal_605164010f6e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494657/normal_602efecb1984a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388626/normal_605f7f0932518.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385028/normal_5feb960539d23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365628/normal_5ffb101c5774c.pdfIn PDF document text
    • http://tisiner.iblogger.org/all_in_1_hdd_docking_875_driver_windows_7_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408323/normal_5fe24d0063410.pdfIn PDF document text
    • http://vegavos.22web.org/sakipixupefetisutakuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404514/normal_6016c67b257b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476766/normal_5fd0e524bb600.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365525/normal_6008084575bbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505326/normal_6054bc9620855.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wibigaja.epizy.com/arrival_of_the_birds_sheet.pdfIn PDF document text
    • http://jibukut.epizy.com/fuxizupevilobejibafefu.pdfIn PDF document text
    • http://vepiwebime.epizy.com/photoshop_cs6_tutorials.pdfIn PDF document text
    • http://riwugenesujo.epizy.com/46614939146.pdfIn PDF document text
    • http://semunolet.epizy.com/rusogofopemenosifopoxu.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_off0000dcce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCE 4928 bytes
SHA-256: 5823db7d4fc6dca012c65c237011e78f60a63b5705b832e208bcc0e58aca853d
font_01_sfnt_off0000ed8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8C 10488 bytes
SHA-256: 99672b2125e88ba5d1b5c6084aa74550aa13f608c4cdf28bb50aa2ed7e2a3231

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