Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc273567f5b62e2…

MALICIOUS

PDF

72.6 KB Created: 2021-02-19 00:45:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9a176937031cfdd0d01c81bf7cc92c1b SHA-1: c8071acbebe12783bad7e73d4453c75fdbbf876f SHA-256: fbc273567f5b62e247a182cb8d265f9f1495cebf07a7306a2adab491c952e375
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with one heuristic specifically identifying a 'mass external PDF link farm'. The primary external URL, 'https://druttle.ru/wb?keyword=i%20robot%20full%20movie%202004', suggests a lure to a site offering movie-related content, likely a phishing or malware distribution tactic. The ClamAV detection and ML classifier further support its malicious nature, indicating it's a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://druttle.ru/wb?keyword=i%20robot%20full%20movie%202004 PDF link annotation
    • https://cdn.sqhk.co/wejagamewo/MgdT2kZ/the_tiger_s_wife_summary.pdfIn PDF document text
    • https://likizosuzi.weebly.com/uploads/1/3/4/8/134886942/b4295dd1722.pdfIn PDF document text
    • https://cdn.sqhk.co/mirofifuba/iieEltI/81759890940.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/bQrjeij/golden_boot_soccer_academy.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/ja5gfig/domino_s_pizza_5._99_each.pdfIn PDF document text
    • https://metifipiwe.weebly.com/uploads/1/3/1/1/131164131/pojasan.pdfIn PDF document text
    • https://cdn.sqhk.co/lewonuvaxu/eOQijCw/vozudexuwaf.pdfIn PDF document text
    • https://rozomibevepozif.weebly.com/uploads/1/3/0/7/130775668/e25ca28c300a0f9.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/fhfhhew/100_greatest_dance_songs_of_the_70s.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/sazariwapa/countable_and_uncountable_nouns_quiz_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/envato_after_effects_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/76703971358.pdfIn PDF document text
    • http://devisufuxuvit.epizy.com/agneepath_movie_song_2011.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/g_star_cad_2018_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/cursive_handwriting_alphabet_practice.pdfIn PDF document text
    • http://vejimugar.epizy.com/bauhaus_regular_font_free.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_off0000e07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07D 5024 bytes
SHA-256: 51ffeb312866f9da7dcaf49ca9bf2925d521e395bbad977b0d2c1fa457931d88
font_01_sfnt_off0000f18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18D 10900 bytes
SHA-256: 7b03ad8c0d51b46f443c9c77b8a84d7464a346147ae3245b88986c7491deb09d

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