Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce704cee77db27a…

MALICIOUS

PDF

82.9 KB Created: 2021-09-19 09:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 06a045cc675d0078a031b9076cf20254 SHA-1: 00fb0efe4d10937708903c51417c994426eab6c1 SHA-256: 7ce704cee77db27ae22fec80cc4c0046ce3f81118afa616ff3c35ecde38a1769
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users. Heuristics suggest it's a lure for credential harvesting or callback phishing, and ClamAV detected it as a phishing trojan. No scripts were extracted, but the presence of multiple external URLs and the nature of the lures strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • 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 https://pistant.ru/uplcv?utm_term=how+to+set+up+a+gmail+account+on+android+phone PDF link annotation
    • http://olympicburger1988.com/uploads/files/56735693163.pdfIn PDF document text
    • http://debnine.net/UserFiles/File/vukegivoletawizinudoj.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/82812240741.pdfIn PDF document text
    • https://wittnebel.dk/file/fufaxuvixil.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/96c06ee62ee47166e283a8bb0d85e6f5/85881781453.pdfIn PDF document text
    • https://jewfri.kr/files/image/files/naforerewidelabofa.pdfIn PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/kitikudodigopoxi.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/4e8c07a86d3a34636668527724442f56/wupupubabe.pdfIn PDF document text
    • https://www.zochrot.org/ckfinder/userfiles/files/59515338758.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/zuzerujoxivixegejonosa.pdfIn PDF document text
    • http://namlinhchivietnam.net/userfiles/image/file/14446064291.pdfIn PDF document text
    • http://vector-mebel.ru/uploads/files/lopotiw.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/12f1d8af2675da8db8b2ab5643a3e6e3/3833144294.pdfIn PDF document text
    • http://teplospectr.ru/images/files/16844914932.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/95694770321.pdfIn PDF document text
    • https://maconlux.ovh/userfiles/files/magez.pdfIn PDF document text
    • https://bacsionline.net/userfiles/file/xetasovewuxesu.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/21820490345.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/feboru.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/13314874786.pdfIn PDF document text
    • http://unsersohn.com/images/file/febivuluj.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/99613641380.pdfIn PDF document text
    • http://discus-rus.ru/upl/file/segufenerekuxotazu.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614240cf781b3---75689976077.pdfIn PDF document text
    • http://limuzine.md/userfiles/file/63678123429.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_off0000dd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A9 11140 bytes
SHA-256: 9963c9b9af71458310f083c2f30e8b0adf08ae00265d31eb917751b22019701d
font_02_sfnt_off00010f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F43 18036 bytes
SHA-256: f217541d75e2b31eaffdc1bd04f526fef2d02db925107aea0e018231ce713a2f

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