Malicious PDF — malware analysis report

Static analysis result for SHA-256 3449a0a555d3544e…

MALICIOUS

PDF

76.9 KB Created: 2021-06-24 02:29:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 000b57ecc065de4eb2968409b696abb8 SHA-1: d9dd1d3263b565c787dce03d4f42ae0209100b86 SHA-256: 3449a0a555d3544eab1135d889b90b9e24e51b3c032d7bed3c1491d9a0bd0289
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal Application Data

This PDF document exhibits characteristics of a credential harvesting lure, specifically targeting MFA or one-time codes, as indicated by the 'SE_MFA_LURE' heuristic. The document contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting a phishing infrastructure. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://wastran.ru/uplcv?utm_term=big+brother+sex+reality
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/64f5f8bdbbf2d05e0e823dfcf891c3d3/8244771995.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160815d6b2450c---veduzemujof.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/d7a9cf52c2c5fd527435026f24efbaed/14890433804.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f47c5a136d---zifuxagore.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/q5seqrm24k23cvf4etlhlv4g5n/zolijevu.pdf
    • https://henklinders.nl/henklinders/upload/files/76044869205.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608697dbadbf6---61839226658.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/a3432be7a0f1a6d1e1e5e53fe1f47f1c/wadosifusegu.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4362be121---75377370748.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2efff87476---wafivitakuwejoj.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/80d42b986c9522838a92a9533b85ccd2/98515641754.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1607c27e196b9c---2960623915.pdf
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/tubotebitewafigebapubumi.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/9d674544a2038bfe18b144225e5a9d96/giwiradufewa.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b844318c072---xusolumedutumekadadamona.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/4bda3ead009986c8cedde8414c0aec13/51038073232.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a57145f24---32152862725.pdf
    • http://curry-box-deluxe.de/userfiles/file/vopezisexosi.pdf
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/fuvodi.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/d6805c4aca1b9c417589f370e60b1959/27715861875.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed5f.bin
1ec601c5e45f820ff2c60ca75237c4737cd364d0116e99f1435321c0e136c3e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED5F 5304 bytes
font_01_sfnt_off0000ff76.bin
853d12d34b509097b3b4fc7954df6a94b41f13b5be5a860e8b8c100e477d52a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF76 11712 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.