Malicious PDF — malware analysis report

Static analysis result for SHA-256 969defd231231be5…

MALICIOUS

PDF

88.6 KB Created: 2021-07-13 16:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2e9c75e0893360c8a589f9f776dc54ab SHA-1: 156aec4f4d76cc69ab1b92259f3eb3fc391317f7 SHA-256: 969defd231231be5bd89e66e678f5078cb9e63f8975836440b506e635091fabe
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The heuristics reveal it functions as a link farm, directing users to various compromised or disposable hosting sites, and specifically employs a callback lure by prompting users to call a phone number for fabricated issues. While no scripts were extracted, the document's structure and embedded URLs strongly suggest it is designed to trick users into engaging with malicious actors, likely for financial gain or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 http://bogelaipigeon.com/upload/file/29134495798.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/ac5cp1tnkvi908q468rm3oiq4f/kepefabeguz.pdf
    • http://rainbowcaterers.in/userfiles/file/paxexuralesuxibag.pdf
    • http://progfin.pl/userfiles/file/50090807037.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160852c2e8eb75---vuguwozalunufuge.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/8goqat9no46em4m6vnmqidtbm1/62435696717.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a596c457b---gerixoruk.pdf
    • https://impactcleaningserviceskc.com/wp-content/plugins/super-forms/uploads/php/files/b498acd4b7e7290cafe0bd202491614a/95485724244.pdf
    • http://bruningfoundation.com/clients/9/99/99acc79c432c4c389b364f5b25189af3/File/sazegedoxijaboxumifa.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/1601811faeec377942dc58307f2c87ab/xuzalujobakowipegizexumuv.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16080305046a64---34289598887.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/202a8915f13866b7d9333236ae9be3b6/lasij.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/28rp66bra3ca4rdkidgohebs95/83554633652.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a487544ec4---lokonu.pdf
    • https://pharmnet.cz/ckfiles/files/files/19177678799.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/ll15kce7keiminoloog9joa91g/5326146720.pdf
    • http://studiofagiani.eu/userfiles/files/71022540338.pdf
    • http://gallery4walls.com/upload/editer/file/29434519065.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875e0126e64---pugarej.pdf
    • http://cnokorea.com/userfiles/file/rupixaxojipowomeratitub.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/f0897284d494d068a3ff6b489b44a4c1/17484733471.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c491e31dc---levamubadofiwudebo.pdf
    • http://agrobud.net/uploaded/file/pebebakaxikorekoduv.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=you+look+rich
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb28.bin
7f46e844c31cab375beda9c406241b5e773f570f3f15b08d9b51744a537f169d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB28 9836 bytes
font_01_sfnt_off000110cb.bin
2caf4ffc139c724e610e9a83d5f3c74f8699ad35c124c3169c3b5300e16beb70
pdf-font-stream PDF embedded font (sfnt) at offset 0x110CB 17076 bytes
font_02_sfnt_off00013d70.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D70 16792 bytes