Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a014ccffa1fe15…

MALICIOUS

PDF

79.5 KB Created: 2021-10-08 00:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f771a4f138c7f1006e56e70a07310256 SHA-1: 56c5c4058a2ba17a54ee752939ba473c396c94b6 SHA-256: f3a014ccffa1fe15633fdf2b32db8f2443f5370e51bcc5d361ea37654d6b2ac4
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting it's designed to redirect users to potentially harmful sites. The 'SE_CALLBACK_LURE' heuristic further suggests a phishing or scam pretext, aiming to trick users into interacting with malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://smidgel.ru/uplcv?utm_term=pearson+geography+8+answers PDF link annotation
    • https://qualitygums.com/userfiles/file/560401414.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/pujejumilisir.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613409a034229---kixugasudapobufenuj.pdfIn PDF document text
    • http://18554080.com/userfiles/file/1231870926.pdfIn PDF document text
    • http://csavarkompresszor.hu/userfiles/file/98866712603.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/2877368211.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/23930873378.pdfIn PDF document text
    • https://essuances.com/ckfinder/userfiles/files/kiretolekesufitozomabemi.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/97559304143.pdfIn PDF document text
    • http://teakdeck.pl/files/file/xadoxeravi.pdfIn PDF document text
    • https://on-call-anatomist.org/ckfinder/userfiles/files/masepexizunodupupis.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/34759683503.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc2991d98c---kexinaxevefovofe.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/bufixevoja.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/13046783999.pdfIn PDF document text
    • http://architettogherardi.eu/userfiles/files/34843495604.pdfIn PDF document text
    • https://kampusogrenciyurdu.com/file/basivaxanub.pdfIn PDF document text
    • http://ashioke.com/images/library/File/bajupowixorekanebabodizil.pdfIn PDF document text
    • http://congtyvima.com/images/Download/zaviwodi.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/24315954313.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/28308443218.pdfIn PDF document text
    • https://insinkerator.us/images/uploaded/file/66788120608.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/sopipuzixu.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_off0000caef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAEF 20244 bytes
SHA-256: c9f992e285495539261b8a89b9b53b9bbbfdc5e7fb6039aa15c882b352ddfded
font_01_sfnt_off0000ff51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11768 10704 bytes
SHA-256: bf49a92385d66d06b1ba263aa00283812d6ff839c34c2ba312d2db67bebea38b