Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c43a0976743d62e…

MALICIOUS

PDF

84.8 KB Created: 2021-07-02 21:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: dd98158f8e6cc7a58379509aa6fb7fda SHA-1: adc1a275fb4d5f1160b852e0bf994acdb2dc1580 SHA-256: 2c43a0976743d62e47d9afcf898d7dfd3cfa30fc42871781434e66eaeca9839d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The file's structure and the presence of external links indicate it's likely used as a lure to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ketchas.ru/uplcv?utm_term=the+dragonriders+of+pern+order PDF link annotation
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9ba5b6cade9ec0ca4fcd723d8ebac843/xazovibabon.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210605_5291480175D120BE.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6b1bd6f6f---giriketijopesemepamezad.pdfIn PDF document text
    • https://klairtransport.com/uploads/files/dakezo.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/f966221aa69d71b34e91ab274b0c1f78/14352388737.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/61ff8c89bb712ddb9718510194183bdf/1574412845.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/1d07b5e6cae9338f8b69f88c40804625/71999679088.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/mefidagixuwugukagimodet.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b44ebed60b2---61961076639.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/78441017841.pdfIn PDF document text
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/kamirolanenera.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/29774018972.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16074c96847dde---43454197534.pdfIn PDF document text
    • https://okinawa4d.com/contents//files/81769901006.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/mapepunovites.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/kuxojaxobagaj.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/27896881608.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/2qhqc9ngv9skvpdrsgmih7floe/xanipavufugir.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ada977857cc---sapafefig.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/a0972b78b7d812aa5a563af783ef64a7/25951659194.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d13928ba6---46862188413.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/bbbed9f3fe2b3ac9bfb4e76a25f546a5/verufobodepuwewoke.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/41911205572.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/93280086698.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1E 10596 bytes
SHA-256: a04a0c2d85fe8a482b0e8db8c93fea5c755058250f28f2f24f6a288345124ad4
font_01_sfnt_off00010200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10200 16968 bytes
SHA-256: ee30768942584371eb484ff15c4ef6f84b15d8cd44759d3286f4e72bea07464c
font_02_sfnt_off00012df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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