Malicious PDF — malware analysis report

Static analysis result for SHA-256 043554062d35827c…

MALICIOUS

PDF

75.0 KB Created: 2020-12-31 17:31:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 04a922992d827d3b1455cf410b008c17 SHA-1: dff5f4b58e836b99e066852a55cffc1cba25a005 SHA-256: 043554062d35827cc8bf947af961b66367218f8b29b4cb5a34542cd337e2c4c1
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body, though partially garbled, contains a lure related to 'get more followers on instagram free apk'. An external URI pointing to 'trafffe.ru' was extracted, which likely serves as the malicious payload delivery or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=get+more+followers+on+instagram+free+apk PDF link annotation
    • https://cdn.sqhk.co/dakagugi/bCggPPM/apple_infinite_loop_store_hours.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/8365352.pdfIn PDF document text
    • https://cdn.sqhk.co/puruwedisuma/cOihjcS/piano_lessons_youtube_andrew.pdfIn PDF document text
    • https://zazukorowoko.weebly.com/uploads/1/3/4/4/134488568/bf770c802f57.pdfIn PDF document text
    • https://cdn.sqhk.co/fegujajox/lgfTgeH/97545877545.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/RLKoo14/51448483169.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/hgibjfF/dop_draw_one_part_level_165.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovusig/huS87ie/nukepakon.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/gupuso/82787121215.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/94701795661.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/facebook_video_er_mp4_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/vosebatibuto.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/kijesezeguka.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_off0000e592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE592 5408 bytes
SHA-256: 5d69034e0a11f3e7de8e8fbbebf1a39201199baaee45a3010f2e4bab263da7a2
font_01_sfnt_off0000f7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FE 11368 bytes
SHA-256: 86a98725e4517f21cf338070e30d1ae397f486c1e4932f08094cfa953eb074a3