Malicious PDF — malware analysis report

Static analysis result for SHA-256 6415297f443c8481…

MALICIOUS

PDF

78.9 KB Created: 2021-04-13 06:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 202206d1908488b73c4963e861c43ada SHA-1: 2df4ca2f875c33a5a707cddb997492eea6eec41a SHA-256: 6415297f443c8481a01692aa9c6c2e557116c2b4d66a3f52d5fa9c7c9deead8a
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' reveals the presence of numerous external links, suggesting a tactic to drive traffic to potentially harmful websites. While no scripts were extracted, the PDF structure itself contains embedded URLs, contributing to the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=how+to+connect+vizio+tv+to+sound+bar PDF link annotation
    • http://nokilibetajew.mywebcommunity.org/convertir_archivo_de_a_word_editable.pdfIn PDF document text
    • https://winupape.weebly.com/uploads/1/3/4/5/134500155/duzojovem_tatovasili.pdfIn PDF document text
    • https://cdn.sqhk.co/naliwanik/egdRgeZ/viginaleronelunagotuguz.pdfIn PDF document text
    • https://cdn.sqhk.co/jemitaso/T0hiKjd/free_kick_takers_fifa_21.pdfIn PDF document text
    • http://matawobedopikam.mywebcommunity.org/brush_calligraphy_for_beginners.pdfIn PDF document text
    • https://xifalazixaxidig.weebly.com/uploads/1/3/0/8/130874217/mixuxomano-goduf.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/6F7Yhji/40614143371.pdfIn PDF document text
    • https://girakojazesu.weebly.com/uploads/1/3/4/6/134675992/ed30f.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/m2ygdhj/the_art_of_war_sun_tzu_review.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/bojafazes/jonazenagesepinaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f0b3edb-59c6-4363-8cf6-5f85f2f5a92a/pazexarafulobuleromewu.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/spelling_test_for_grade_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a19e740-e236-4594-872e-5185aa9c7e80/79664036599.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/corsair_k95_keycap_set.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/80856277238.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/91989467391.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_off0000f923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF923 5204 bytes
SHA-256: 86dcae4550cfb54746bec4b4885f6ad816db1962a487e4a482cd644c17505053
font_01_sfnt_off00010afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFE 10388 bytes
SHA-256: 6050a98b210ee5cdb45de569d2ac6c359915a8246b1499cfd60acb8a19225496

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