Malicious PDF — malware analysis report

Static analysis result for SHA-256 172d188aa7c2b22b…

MALICIOUS

PDF

79.8 KB Created: 2021-01-11 13:30:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d64a90dcc59483a9d8781222f40d5438 SHA-1: 015a2640b74283b299fd775eb1171ee864137979 SHA-256: 172d188aa7c2b22b21c3f7a9d4554df2d6a6e9f361654596ea79fcc97ca56b63
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and contains an external URI pointing to a suspicious domain. The document body, though heavily obfuscated, contains text related to photosynthesis and aerobic respiration, suggesting a lure to a phishing site. No scripts were extracted, but the presence of an external URI and the nature of the ClamAV detection indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://trafffi.ru/123?utm_term=photosynthesis+and+aerobic+respiration+similarities PDF link annotation
    • https://site-1177725.mozfiles.com/files/1177725/zisigesufu.pdfIn PDF document text
    • https://site-1198442.mozfiles.com/files/1198442/sexiest_kpop_music_videos_2019.pdfIn PDF document text
    • https://site-1175914.mozfiles.com/files/1175914/clinique_city_block_30_review.pdfIn PDF document text
    • https://cdn.sqhk.co/xanuramalu/jc2ehjy/59232957508.pdfIn PDF document text
    • https://site-1179767.mozfiles.com/files/1179767/medieval_period_war_horses.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nitatotol/bosonoga_bogini_chomikuj.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/ftse_all_share_index_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/tisufixugovikesamonuve.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/jobemokuja.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/best_guided_tours_to_costa_rica.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/brave_flames_of_love_ulub.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC8 5344 bytes
SHA-256: 0bb3b8da689a9bf18e5378346f8b53b6308b1be13111397b0bf474e10bbb6282
font_01_sfnt_off0000feb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB6 10840 bytes
SHA-256: 76d1bc302d1883cb8f83115b725f841656c1b918de7273eff2f184723b06f438
font_02_sfnt_off000123c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C3 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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