Malicious PDF — malware analysis report

Static analysis result for SHA-256 23de66a9e9104708…

MALICIOUS

PDF

80.3 KB Created: 2020-11-20 00:01:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b4a1dc34ffaa1743c424b3da5f6e2502 SHA-1: db5e037866f9587e933359b01effb11a0c0b5ca9 SHA-256: 23de66a9e91047083de881f9e9140546629e10fc497b9d456abebc5559e4ca91
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. This URL is likely used to redirect the user to a phishing page or a malware download site. The ML classifier also flagged this PDF with a high probability of being malicious. Although no scripts were extracted, the presence of a malicious URL strongly suggests a phishing or malware distribution attempt.

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://traffmen.ru/123?utm_term=giggles+in+the+middle+8th+grade+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393785/normal_5fa01432452e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385859/normal_5f8d4cdbc2969.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d53ea159-255e-4dd3-b821-265504c16951/tokyo_ghoul_re_myanimelist.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/9408171777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7ef731c-0d8e-4ec3-a21f-845f4b7c2613/bose_wave_radio_ii_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/24015602812.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/55558614760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/784dd491-485e-4960-a64f-18474ba9257a/54775169442.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e5e862e-8107-412d-a921-e4e0fe79cb2f/sleeping_with_sirens_legends_mp3_dow.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/kudelixeniviroruwizurakun.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/subaru_pressure_washer_coil.pdfIn PDF document text
    • https://s3.amazonaws.com/goporo/29896929273.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/93659062508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/523787bb-0553-4565-ade7-1ce1cbf4bbd5/lojor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45e21d43-f620-45fd-8987-fa68bb08932c/isai_tamil_nee_seitha_mp3_song_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f92b5e3-f186-4ad4-a094-b638bdc2040f/java_se8_for_programmers_3rd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/running_man_20200823.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_off0000fb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB16 5556 bytes
SHA-256: 876cb6b9d12b41d827a36fc830947a8b986f70a0e0a03c248287a3a724c9574a
font_01_sfnt_off00010ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDC 11192 bytes
SHA-256: 8cf61ff0b3724d39984d8408a464e2ac78ead0499f77c6cc2ba85aba2aef67c2

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