Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d4c9da27ee605c9…

MALICIOUS

PDF

89.4 KB Created: 2021-01-10 05:35:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: ba6feb7ebeb6058c85964eab1c1e1030 SHA-1: 689f3a741679d25224a80915efb05e590dc02424 SHA-256: 5d4c9da27ee605c956340a33acafda3b10c4a750948d24ab3e772d30d83ce72d
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting a link farm or phishing campaign. The embedded URL 'https://trafffe.ru/123?utm_term=donna+d%25E2%2580%2599errico+nude' is likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafffe.ru/123?utm_term=donna+d%25E2%2580%2599errico+nude PDF link annotation
    • https://cdn.sqhk.co/nodewanase/ijcjihd/62740153467.pdfIn PDF document text
    • https://site-1177817.mozfiles.com/files/1177817/yeezy_700_analog_white.pdfIn PDF document text
    • https://site-1178414.mozfiles.com/files/1178414/rejulomijem.pdfIn PDF document text
    • https://nokavapeselodes.weebly.com/uploads/1/3/4/6/134638024/gokokireno.pdfIn PDF document text
    • https://site-1166675.mozfiles.com/files/1166675/777_free_slot_machines.pdfIn PDF document text
    • https://site-1168059.mozfiles.com/files/1168059/vikings_series_6_part_2_trailer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393911/normal_5fa92f3c30456.pdfIn PDF document text
    • https://site-1168414.mozfiles.com/files/1168414/rts_3_programska_sema.pdfIn PDF document text
    • https://foroziroxodom.weebly.com/uploads/1/3/4/6/134647192/pebusetot_zuxomurom_levapu.pdfIn PDF document text
    • https://site-1175494.mozfiles.com/files/1175494/fire_staff_code_cheat_sheet.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/wogikokuzotaxa/gta_san_andreas_mission_amphibious_assault.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/centos_6._6_iso.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/vivian_divine_all_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/jetblue_airlines_flight_status_1822.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/a_level_biology_ocr.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCC 4772 bytes
SHA-256: ff152d89a5506407e839de6727271f7775c8c6ca6aba34a7a236539a98101db6
font_01_sfnt_off00010d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D23 17640 bytes
SHA-256: 6ed2193bb50ac4f7c15cb1e578ce1326b16663f50ccfd5c75ce9398d7e91a9e2
font_02_sfnt_off000141e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E6 16060 bytes
SHA-256: eb67323a3edc51f073cf7ae7c668a4400309481d93a41d1ca3bfc03d889966df

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