Malicious PDF — malware analysis report

Static analysis result for SHA-256 56db072d7c2633fa…

MALICIOUS

PDF

93.6 KB Created: 2021-08-01 21:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 25da46e13b05e38e871372e4c829af54 SHA-1: b59b0060d2ded21d4028874ccb71e623bec1ef17 SHA-256: 56db072d7c2633fa2218e8721d72bd484bc96bc93fc501afb619c99e3fa320bc
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and embedded URLs are indicative of a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92a2992cc5---benimoxim.pdf In PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/jidapafiven.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c29edcba404---24961760503.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/8b098183e033b3ac5fb4cb691034a48a/sivodamu.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/63055897348.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/9546865822.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834f7b449ca---batuvibepupemurekiz.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/jikowiweniliforowepenuxip.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/97901107341.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/jatosawiratesa.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c965fcb24f5---76178517543.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/6f1fb7e82643536db42293a481dd2f6c/83587335607.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/5580949404.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/pidodal.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/30b1e0ac3588d82e93f308c541abc864/pesumanomexawamopezevukif.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/90aidklsuicnen8h1o0rsom7m3/80603986552.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/16648411802.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/39506674912.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/kuburewixoxalusunogozoki.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b82a813bb00---89854117114.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a95cc1cc549---bawutozeranokosevu.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/72752789966.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084dbb2aa741---napisutugobosujudegekon.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/f3360d2ff1a0e5d80378363cbb7aebbc/28526079924.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160f3dda5257fe---welizijelazipewopakajolux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=my+candy+love+university+life+episode+5+walkthroughPDF 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_off00010643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10643 11484 bytes
SHA-256: 9fe0f717e325373b678892dbc6984afdbc65e8e1da9001864180b44d5e34ad9b
font_01_sfnt_off00012153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12153 16936 bytes
SHA-256: 4ebb3c854457c9ee021176b2a7dfb6c4493cc61c4b454354a3019afd03cd7905
font_02_sfnt_off00014d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1