Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa994846e50e62d5…

MALICIOUS

PDF

78.3 KB Created: 2021-01-12 04:49:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dfef0065cb68a896e04205ebc67f377c SHA-1: d732cbde8577bdd349703554d5a227d48ad56435 SHA-256: aa994846e50e62d58789699723cb2477373f01912f12f7d22e414164eef9d8b6
156 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristic detections indicating it is a phishing document. The primary URL, traffset.ru, is associated with a lure for 'Ludo live download', suggesting a social engineering tactic. The presence of numerous external links, including a link farm, further supports the malicious intent of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffset.ru/wb?keyword=ludo%20live%20download PDF link annotation
    • https://site-1171153.mozfiles.com/files/1171153/teamfight_tactics_item_cheat_sheet.pdfIn PDF document text
    • https://tudupumodowi.weebly.com/uploads/1/3/1/4/131406798/6435199.pdfIn PDF document text
    • https://tolafapod.weebly.com/uploads/1/3/4/4/134486806/kesabudunona.pdfIn PDF document text
    • https://bitojobuf.weebly.com/uploads/1/3/4/8/134892495/ff2aa4e17ed.pdfIn PDF document text
    • https://dopuxaponaxu.weebly.com/uploads/1/3/2/6/132695391/9c8a6d23.pdfIn PDF document text
    • https://kigodebilak.weebly.com/uploads/1/3/5/2/135297846/2023af836e59be.pdfIn PDF document text
    • https://site-1194115.mozfiles.com/files/1194115/39187068751.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/fakaxibigo.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/bezegoluzose/balistica_tecnica_forense_octavio_cibrian_vidrio.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/linupedazajobilutida.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/69422751419.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/31727311493.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_off0000deba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBA 4636 bytes
SHA-256: 660626eff34d1857af2c11a2baf27f47318358c82ce52df3c4e40568546942b7
font_01_sfnt_off0000eeaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAA 11212 bytes
SHA-256: 17b8021b6513ee2e08da500d55301e9a9caae590e2c1499fe3804eb0c6c09ca3
font_02_sfnt_off00011523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11523 16240 bytes
SHA-256: 0abc301a75bcb62837e1b39699efeab516a7677702cdcadbd45931fa139eeed5

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