Malicious PDF — malware analysis report

Static analysis result for SHA-256 f984282ce3e5240b…

MALICIOUS

PDF

77.2 KB Created: 2020-11-20 23:29:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fa07ad46b2cec44248c27351b9bd6be SHA-1: 1733b3cacaed50317e4b3a6c312440013a3d607d SHA-256: f984282ce3e5240b5de2a97dccb4a5534d4c34faf53a9aac77b0f43858c9d04b
156 Risk Score

Malware Insights

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

The 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' suggests the document contains numerous external links, with one prominent URL being 'https://trafftec.ru/123?utm_term=mulan+shan+yu+bird'. This indicates the document is likely part of a phishing or malware distribution campaign, attempting to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/123?utm_term=mulan+shan+yu+bird
    • https://nepagezefo.weebly.com/uploads/1/3/4/4/134472827/sewew_todusatuwiz_gorokuw.pdf
    • https://fewaxozane.weebly.com/uploads/1/3/4/3/134341296/mijepetuxuvo.pdf
    • https://pozimetotekiv.weebly.com/uploads/1/3/4/3/134339641/99c0f546f8e6830.pdf
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/d7ac576.pdf
    • https://kezopepeza.weebly.com/uploads/1/3/4/3/134332650/senerutike.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/sasufufa/ultimate_nintendo_guide_to_the_nes_library.pdf
    • https://s3.amazonaws.com/felasorarabipis/78235711265.pdf
    • https://s3.amazonaws.com/xebareto/9041637940.pdf
    • https://s3.amazonaws.com/pusumowi/unblocked_games_street_fighter_66.pdf
    • https://s3.amazonaws.com/vixuwogetiv/67982928116.pdf
    • https://s3.amazonaws.com/netinuwa/firefox_52._9._0_64_bit.pdf
    • https://s3.amazonaws.com/tadovu/diferencias_entre_adrenalina_y_noradrenalina.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e434.bin
8de6a9cc87cc015fde0b05a954f00cc619e9d350561058506a0c902a639311d4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE434 4736 bytes
font_01_sfnt_off0000f41c.bin
0e8e61be5813905f7f8152f310566ca26b033d139e5cbd466299f95251876dfd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF41C 11392 bytes
font_02_sfnt_off000119ef.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x119EF 4324 bytes