Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc72a687ed178982…

MALICIOUS

PDF

82.8 KB Created: 2021-09-02 03:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a68787279cee1510aef5dae5173b9267 SHA-1: 7c585af0009e913edcf7d0d2bec3e5a9d696cc3a SHA-256: bc72a687ed178982aaf30d941146bc6e55168f5e5e2bc3de0b358c2418aad51e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting it functions as a link farm or redirection mechanism to malicious content. The presence of external URIs and link farms on disposable hosting further supports its role in a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://philabc.ru/uplcv?utm_term=candlewood+suites+coupons PDF link annotation
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/8eff7b00bd67b422d59f5ecd88baa2a6/gidutemupuvad.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/r8cnkn9dv9nuccmiueriojqkmn/mopurodimedozi.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/aaa90de54438b60373d62fdb278c6e60/wimutikov.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/u264p4bjqq3ek5o6r0638snkntvghg7q/luxigobixirupulet.pdfIn PDF document text
    • http://www.drivingschool-brno.cz/files/files/71023262680.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612dd192ddff8---67875547575.pdfIn PDF document text
    • http://druckmaschinenservice.com/uploads/fce/files/44300635880.pdfIn PDF document text
    • https://feldmann.pl/userfiles/file/xebipejuzix.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/9f1fce2f8cc6e33315f107957803382d/jokulonute.pdfIn PDF document text
    • http://etnorom.hu/pictures/69441370796.pdfIn PDF document text
    • https://i3mit.com/shopadmin/upload/files/2194973192.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/bjn3htniesupr4r38k2oum552j/molatimef.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/57967142349.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/katakixokilinakezazulojo.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160782284061f7---11213351534.pdfIn PDF document text
    • https://ms01bet.net/contents/files/lasinukagigifitizukam.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/sirujudalogeriximof.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/77645483971.pdfIn PDF document text
    • http://ciskmv.com/css/file/60833021595.pdfIn PDF document text
    • http://sb-78.ru/files/file/28642516756.pdfIn PDF document text
    • https://xn--hjrnskadeakademien-mtb.se/userfiles/file/27099180216.pdfIn PDF document text
    • http://falconltd.pl/cache/file/86131839689.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_off0000dc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF474 10624 bytes
SHA-256: 9baac87e536944876bcf1e04bb769295e183ffb693c696f36cdb82035d85b351
font_02_sfnt_off00010cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF6 18484 bytes
SHA-256: 5fdb7fef45473f7fb60989f10e7eddae3b90f81f34f897ee9b9817e9cba41ffc

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