Malicious PDF — malware analysis report

Static analysis result for SHA-256 8863ea85477e892f…

MALICIOUS

PDF

109.1 KB Created: 2021-07-07 21:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1a203a4a991b88a81bbc0a3cd452508f SHA-1: 038d9483d2edc09df8656b82703beeed82aa02b4 SHA-256: 8863ea85477e892fc11f2cce060cbdc6942e936b7acd62477b419336e04c7b75
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or malware distribution lure. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely serving as a distribution point for further malicious content. The presence of multiple distinct hosts and the use of disposable hosting reinforce its role in a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/5d012b50eddeea8a68eda2607adbb4a9/xoripeviweliminavetabator.pdf In PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/87153803741.pdfIn PDF document text
    • https://reniuved.it/file/70894974134.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/95106055292.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/99fd98c853979eae1ff9a59ffb29157b/75795200150.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16078f052a6e09---lewuselopas.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792686c5d6a---taxavaxikelapoweg.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/vebosor.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/kgtusq8l9klf1tdrua6c24d7vo/worifemapejaxosejexe.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/zutofifevinom.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d81c0361b78---vusewejedibixisapodibofix.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a2d66528e---46385265147.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/aba5a31537b32a68b2063cc2c4dbd1e7/91590255403.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/xaraki.pdfIn PDF document text
    • http://championsview.net/userimages/pejavimi.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/086d1d6bb784df7b379d35098b38bf2e/56194758646.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/58566679262.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160d4db60e7f94---71438477211.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160dbd701123de---17583921461.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/32969412581.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a705300e158---26031734466.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4fe7f32d69---39744769150.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/80cefa529542b7675a805c03bc396e39/dekujazutisefuxuzitibibi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=culture+yahoo+answersPDF link annotation
    • 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_off000149cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000161df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161DF 17364 bytes
SHA-256: 60b0c02bc1e1b6894eeaff6d24e8a61f7f2d3acb16eaf3dad268ed5e5f1f02a4
font_02_sfnt_off00018f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F53 10444 bytes
SHA-256: 8b214b9a227b19f321ef7af5149672481439d563987ac438ed4386193bc65814

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