Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4228228af669b62…

MALICIOUS

PDF

70.5 KB Created: 2021-09-06 21:17:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dc4f225c81600ddf93b91f807be26089 SHA-1: 10819ab8b5c7985ae46e8d4eb393c32f7a6a37be SHA-256: d4228228af669b623946cc1f59f38cf8c740993542bebd067932c620a10bc5b2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links to external resources, many of which point to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content or further stages of an attack. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.zywawiara.pl/pliki/15957561032.pdf In PDF document text
    • http://a-swiss.com/upload/userfiles/file/denupexijumelefetomesoso.pdfIn PDF document text
    • http://hidra.it/ckfinder/userfiles/files/kogefivuraj.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7f851a954---77471833233.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/21670580674.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/1031527400.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5dfec0269---22292232030.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/tiwuzimivuvegidi.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/94263670146.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210813065219.pdfIn PDF document text
    • http://solucionesinmobiliariasavg.com/ckfinder/userfiles/files/nipaduvopigade.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/fosobotum.pdfIn PDF document text
    • https://samsungklimamodelleri.com/upload/ckfinder/files/refovunomuxesi.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160750b981bd7e---43223005349.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/xosovezasinutotuvamafer.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/pigazupepudimimit.pdfIn PDF document text
    • http://ambulatorioveterinariosantanna.eu/userfiles/files/18674147499.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f63648f2a9cda9c1bff107e62d194984/toposekazusiwiro.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/76887813437.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/u28snkkjk9mvrsn9d0pli8qp2u/rajivuza.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/57709557614.pdfIn PDF document text
    • http://shinyoungvalve.com/userData/board/file/33195821251.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=valses+poeticos+guitar+pdfPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/738673bd98aa9295153290f19f1bc231/riferaxedagigizimomijed.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB432 10760 bytes
SHA-256: 68839c8761106bf79b6cca5b559c161d50930f3c03413a761c364d9cbb7b782a
font_01_sfnt_off0000cceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FD 15624 bytes
SHA-256: 140143479b1a6b444ff8f2702185ee4cb20ed8b26e7e5b3b4db4c1a05dc6b4fa

Open this report in the interactive analyzer, or submit your own file for analysis.