Malicious PDF — malware analysis report

Static analysis result for SHA-256 db492f36da3f0e7d…

MALICIOUS

PDF

133.8 KB Created: 2021-03-14 22:05:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 925eae489e724cfcbf7b48e251d57af6 SHA-1: 5dd14365109f46aeee2fd2dd6453cceb97973d4a SHA-256: db492f36da3f0e7ded79ed6484b42c89af5e593b43cf80cc741d91fa366b3b64
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm designed for SEO manipulation. One of the primary external links, 'https://jumiwimov.ru/wix?keyword=poulan+pro+wheeled+trimmer+manual', is presented as a search result for a product manual, suggesting a lure for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing a trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/wix?keyword=poulan+pro+wheeled+trimmer+manual PDF link annotation
    • https://cdn.sqhk.co/naxibibu/cjfhgnb/unnatural_vegan_swayze.pdfIn PDF document text
    • http://bufibinokurun.scienceontheweb.net/90044148355.pdfIn PDF document text
    • http://pidawudimo.scienceontheweb.net/life_fitness_95ti_parts_manual.pdfIn PDF document text
    • http://pumorux.medianewsonline.com/25514119629.pdfIn PDF document text
    • http://naturalm.space/68657173287hh1xc.pdfIn PDF document text
    • http://migerov.xyz/pokemon_y_iv_breeding_guide5uojn.pdfIn PDF document text
    • http://nextauto02.ru/how_would_you_define_prime_numberwnfix.pdfIn PDF document text
    • http://umniashka.ru/56058181971srthc.pdfIn PDF document text
    • https://cdn.sqhk.co/gasukatebu/jgcjeig/how_to_beat_matchington_mansion_level_911.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/skyrim_freezes_xbox_one.pdfIn PDF document text
    • https://cdn.sqhk.co/gawarebadal/7fqcggy/78476666992.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/fizup/autonomous_maintenance.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/boomerang_songs_isaimini.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/all_over_print_design.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/65967265763.pdfIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_85854e0376eb491bbbdb88b9c3e2ba13.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/captain_america_civil_war_cast_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/camscanner_pro_full_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/2410999574.pdfIn PDF document text
    • https://786c536d-253b-4a15-94df-129c4693a223.filesusr.com/ugd/1fc311_58e6b5fbb0164f538f8fd6e2883db56d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/zumepa.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/woworines.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_off0001c814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C814 5116 bytes
SHA-256: 6abc2882be579f3ccdb637a0d94889d22a69a628aae6a1102b16d47d2c613755
font_01_sfnt_off0001d95e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D95E 15332 bytes
SHA-256: 1151ea3b86ceb5e2d4ef0d404ce2d2ac42814286cb9ce4182c0cdc41784e813e

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