Malicious PDF — malware analysis report

Static analysis result for SHA-256 1baf72e22121513e…

MALICIOUS

PDF

81.5 KB Created: 2021-09-05 00:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c84d7ab943fc8a0b200c1e2dd4d8b2ff SHA-1: 22673a8df8ffbd8ec3e335b576c04896ac1fa9d6 SHA-256: 1baf72e22121513ea91ccb482d03623fed91ad59d43c52108d41f0b535678968
176 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with several URLs pointing to compromised WordPress sites or disposable hosting, likely to obscure the true destination. The 'SE_CALLBACK_LURE' heuristic strongly suggests the document's purpose is to trick the user into calling a malicious phone number, a common tactic in tech-support scams and callback phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 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 http://fixafilm.se/userfiles/file/68277137163.pdf In PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/pogafigo.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c99edbb676---5423822919.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/pufekator.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/fubanowupuwomovirujaped.pdfIn PDF document text
    • http://myflora888.com/ck_files/files/rokijatusofekuj.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/18195187579.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/gakepodasibimajuwos.pdfIn PDF document text
    • http://nktrading.qa/file/files/zibenukobebe.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/15990293018.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/bujirekelotulutodurojosof.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/si68l40mvo9e7bmqnnqfgcpcna/52771129389.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/48934497270.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/86013437728.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160be8f84b9e70---30229947054.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1823691b15---48452089801.pdfIn PDF document text
    • http://qamsar.org/userfiles/files/befik.pdfIn PDF document text
    • https://cherrychile.cl/cherry/uploads/contenido/files/wagofosejibenegavo.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/66356612960.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/rebewosilemibusavetixus.pdfIn PDF document text
    • http://hrjok.com/uploadfile/file/59952683403.pdfIn PDF document text
    • https://ijpdua.com/contents//files/tobevixipodawivogavutafej.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/fadamapuxuju.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c70efb14df6---risogiveselezagubaga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=law+books+south+africa+pdfPDF 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_off0000d8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BA 10812 bytes
SHA-256: 3d9c3974cbc80d44429049637fccebd917c22d4fd0e81592ef31ee46c5df5758
font_01_sfnt_off0000f1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CC 17884 bytes
SHA-256: d69c0402423621911b040a35a41347780d472ce30c0986a4151e794e58804abc

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