Malicious PDF — malware analysis report

Static analysis result for SHA-256 a938eb8005293ffd…

MALICIOUS

PDF

68.7 KB Created: 2020-12-18 18:25:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b247bfee18bb22e20a1f23ce9f91dbf1 SHA-1: 20caf4bbb348a71a1969217f9a293814bce23e68 SHA-256: a938eb8005293ffd16e16f8a9b39a9c83efd306eca500eb5fa056f5c54bd8274
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The embedded URL, 'https://traffine.ru/strik?utm_term=download+real+steel+mod+apk+unlimited+money', is presented as a lure for downloading software. While no scripts were explicitly extracted, the PDF structure and the nature of the URL suggest an attempt to redirect the user to a malicious download site, characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=download+real+steel+mod+apk+unlimited+money In PDF document text
    • https://cdn-cms.f-static.net/uploads/4454971/normal_5fa0ee542e0c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477626/normal_5fdb917367bea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe091d3570fb44d1ca4b76/1606289698517/azithromycin_500mg_for_sinus_infection.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc16c877848ba205d1c3861/t/5fc491a43570fb44d194daee/1606717860974/ascend_12t_kayak_replacement_seat.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe57b43c02f22b9ddbe045/1606309813009/fezaloxoxogowubizezaz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1343bd26ff1194f75a191/t/5fc5677118e72e5fdb8dd94e/1606772594465/pekibedazeguxezuzinowezab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c40ea01-8f76-43bd-ab01-fe9283176835/3102171822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7dcb318-4e84-4742-ade1-18af2d9285ca/19558987971.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6b2965bcb0228a2ab1122/t/5fcb8fcba51c5a1401abd184/1607176140049/paviguje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88a8c564-5420-4cb3-ae03-a903ef0094e6/west_liberty_sakai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f320d1a-dc16-4fcb-a888-71bdcc1a5843/wife_reads_affair_texts_at_wedding.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/fringe_season_4_episode_guide.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_off0000cf7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7C 5364 bytes
SHA-256: a7bb8d58d26f15941dc08887bb813cd35e8825e6e849f40fd53e508c5d801556
font_01_sfnt_off0000e1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BF 10604 bytes
SHA-256: bc7adacea0c2d5ce48bff34d73f151fc23ddd1f48e9a75a3bbca8ef8e639f1be

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