Malicious PDF — malware analysis report

Static analysis result for SHA-256 96752b126eac225a…

MALICIOUS

PDF

80.9 KB Created: 2021-09-22 09:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 26b070ba29a08307490c2f99d7a389f4 SHA-1: cb2193f62450301ec99f5ffdbb8d66505c7485d8 SHA-256: 96752b126eac225a495c7fc502811fcc7449814a92f3018deceeb562cc1e4110
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of external links, many hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of UTM parameters in some URLs indicates an attempt to track user engagement with the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • 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://synerhu.ru/uplcv?utm_term=red+hotstar+app+download+apk PDF link annotation
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141fd507716f---49032930566.pdfIn PDF document text
    • http://sjzhtchem.com/upload/files/lavunonarikubano.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/32224950276.pdfIn PDF document text
    • https://pmrmhss.com/userfiles/file/28406844759.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614090954fd0e---25521880261.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/73132223077.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/rimanarelami.pdfIn PDF document text
    • https://hotelcorona.ro/files/fokedipomutekumewaxuwene.pdfIn PDF document text
    • https://lrsdev.com/userfiles/file/vokaradarunanigozakabidu.pdfIn PDF document text
    • http://merwepizza.com/upload/file/30366618210.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613668a096c37---5726466274.pdfIn PDF document text
    • http://www.golfusa.be/userfiles/files/44809450912.pdfIn PDF document text
    • http://kompassztuki.pl/Image/files/36377372808.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/kf2ktc8ngilvtpqijlja20qkle/75965795558.pdfIn PDF document text
    • http://yuanjiangchem.com/upload/files/95121601746.pdfIn PDF document text
    • http://vino-charlie.cz/userfiles/file/bozufugule.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/52597709561.pdfIn PDF document text
    • http://alatasfilms.gr/ILC/img/file/sofumotexum.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210908122534.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/89286962005.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/nowagazagewi.pdfIn PDF document text
    • https://www.mnogotrop.com/ckfinder/userfiles/files/44066463730.pdfIn PDF document text
    • https://anakaygame.net/calisma2/files/uploads/15416143233.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_off0000d91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12C 17240 bytes
SHA-256: 7b045faf40c8c7fb20843ab43084eed4345392ab34bf86e8cbc0840da242a4d4
font_02_sfnt_off00011d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8F 10620 bytes
SHA-256: db7d8622ea018ace37132a4cc109a579123c0d0949cf24523e22a5f2a40c3277