Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc65c1a3006ab8c8…

MALICIOUS

PDF

82.3 KB Created: 2021-09-22 15:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6c52b736c8b0af4968bfb57d71405604 SHA-1: a884e3394ed3a964048f4897bbb211404dbe59cd SHA-256: cc65c1a3006ab8c83d3933dd37671909041fdf48ab98300664151d42b8f19d93
276 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document exhibits multiple high-risk heuristics, including a fake CAPTCHA, a lure for password-protected archives, and an MFA/one-time-code harvesting attempt. These elements strongly suggest a phishing or credential harvesting campaign. While no scripts were directly extracted, the PDF structure and embedded URLs indicate it's designed to deceive users into performing an action that compromises their security, likely leading to the download of a secondary payload or direct credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://maivietnamesecotati.com/uploads/files/wivizujawerakurev.pdf In PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/7a542910b5fe48bd4e6209af414d08e9/nuwajemi.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/7003575993.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/paxazadejavuriwadim.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16134392eb85af---vasaxegutot.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/718599c5ef0c273dd95e9058f2f39153/nijidosajodik.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/2367f04eb633c6d8bb7288194c75736f/41560579836.pdfIn PDF document text
    • https://nedimgame.net/calisma2/files/uploads/73067022848.pdfIn PDF document text
    • http://rockhouseschool.com/rockhouse/uploads/files/20502595591.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f981790af5---gipebo.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/lanusoxo.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/ponowutaketumuwe.pdfIn PDF document text
    • http://nwatchonline.info/userfiles/file/wavig.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/5634113660.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/94228223287.pdfIn PDF document text
    • http://www.tm-africa.com/beta/public/uploads/cms_filescms_files/52993308036.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/2c2ba83dce6a9912b21a44c7c991f70d/zakaxubikenuwiguxelite.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/jebesumaseb.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e8883367d0---pujakiwafebotep.pdfIn PDF document text
    • https://b2bircruise.travflex.com/bot/ckfinder/uf/files/25538710203.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/54980878005.pdfIn PDF document text
    • http://lifeline-sports.com/files/file/xokad.pdfIn PDF document text
    • https://cytokin.ca/upload/editor/file/92584062378.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=live+sign+in+inboxPDF 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_off0000dba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B7 10144 bytes
SHA-256: fd6df706555c25168a04b0b5e9ba7fe008c03642cd93e30283f2adeb9fe41bec
font_02_sfnt_off00010a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A87 19124 bytes
SHA-256: 60a3029edd970d705c1488cdbec4da1b82cd1675bb9d03c295df63ed59e4f68e

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