Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b0f41f3440aab9…

MALICIOUS

PDF

85.5 KB Created: 2021-02-17 23:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 82783806ed63289e435e1a2055f7b658 SHA-1: 34469356536165986599f8054afba33f0f75b329 SHA-256: 34b0f41f3440aab9e78ea2d84b0140403559e71765d044979b4ff247d33fa853
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URL point towards a phishing lure designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/aws?utm_term=cheap+dirt+bike+near+me In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390081/normal_5fdb55432deba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5fd61e630ef04.pdfIn PDF document text
    • https://cdn.sqhk.co/rifibimilo/ij9CASi/zuveru.pdfIn PDF document text
    • https://cdn.sqhk.co/vidujubotaf/iegfjhO/40859938499.pdfIn PDF document text
    • https://cdn.sqhk.co/leburogutu/h0ihgjz/bixileminenem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366029/normal_5fcd50c42c540.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383131/normal_60067ad05918c.pdfIn PDF document text
    • https://cdn.sqhk.co/lidupusumoj/heQT5jh/school_driving_3d_hack_ios.pdfIn PDF document text
    • http://regifugujuvu.iblogger.org/dell_poweredge_2900_weight.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/haibSgi/fantasy_war_online_multiplayer_battle_royale.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/eifaNkq/noruniji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419191/normal_6025903421f8c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/play_store_for_pc_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/dufikamidiwiralirutalafo.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_off000113d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D2 5096 bytes
SHA-256: 6c604306f4362da6cb3eb8d3c01e7bbe7fd085f492cd84ee071685e808ec18bd
font_01_sfnt_off000124f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F0 10564 bytes
SHA-256: 2a0742e7093dd9dc5d0711164c1244e1b739ae0f2f15653d5b767f3be1c4fc00

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