Malicious PDF — malware analysis report

Static analysis result for SHA-256 7186fa9b1a88f27a…

MALICIOUS

PDF

80.2 KB Created: 2021-09-13 17:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: da9fcc97eda0ffc64b4f17b14d1b241b SHA-1: 18009d782b67cacdc4aadab3af02fa160125d2f0 SHA-256: 7186fa9b1a88f27a0c0af04cd9ee1d9f34324e210579f59fb97713a7a03a94af
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including ML classification and ClamAV detection. It exhibits characteristics of a phishing lure, specifically requesting recovery secrets or private keys, and also contains a callback lure. The presence of numerous embedded URLs, many pointing to disposable domains, further supports a malicious intent, likely to redirect users to phishing sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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
  • 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://kanizsakran.hu/userfiles/file/51205849504.pdf In PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/62316903417.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210913_E5C910F560F1E81A.pdfIn PDF document text
    • http://clainvest.pl/userfiles/file/betojebitudiladekanen.pdfIn PDF document text
    • https://kligi.viart.lt/ckfinder/userfiles/files/44490541170.pdfIn PDF document text
    • http://www.itidharamshala.in/images/uploads/files/bugozetaxezumobabemoxi.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/161384624bcfb0---47324222707.pdfIn PDF document text
    • http://orel-trinity.ru/sites/default/files/file/58927008962.pdfIn PDF document text
    • http://siblom.ru/files/upload/file/gasimavenix.pdfIn PDF document text
    • https://priscar.com/documents/files/xakosidamawofor.pdfIn PDF document text
    • http://getsolarny.com/userfiles/file/donagizilabe.pdfIn PDF document text
    • http://bibliotekaszamocin.pl/img/upload/files/xizukajokadavugi.pdfIn PDF document text
    • http://thcsnguyenvanhuyen.hoaiduc.edu.vn/ckfinder/userfiles/files/kedaburewafafasabanuzo.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/vukikutokunisizopifumarak.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/najuzudo.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/wirokalej.pdfIn PDF document text
    • http://zeshengtecphar.com/UploadFiles/FCKeditor/20210906080628.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/xotatosevateki.pdfIn PDF document text
    • http://5thaveseniors.org/userfiles/file/wujavopaxijopexesufera.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/zotatixasilefajoxesafabav.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/3ufr3487e7hskkgcbpb8f30844/kevovupuj.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/rogotozonenunikonag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=telegram+apk+free+download+for+windows+10PDF 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_off0000d5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF6 17100 bytes
SHA-256: 0751a63c14f3cbb5e1bf47329f60c514194b1b4aae99d25f13ff4b77258633be
font_02_sfnt_off000119c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C3 11060 bytes
SHA-256: 1b112d028deee83f840315255a1b63b50542714c61c7e17ebf2b8f1f183221bc

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