Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6d32a00b9b4c65…

MALICIOUS

PDF

77.7 KB Created: 2021-09-18 21:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e13b3f1a63b8cd30b5d20d54b3fbd50f SHA-1: 7d4eed19b5d00d3edc4645e981ff74854ff68e42 SHA-256: fe6d32a00b9b4c658847e5f000905d11b54e44a3e2043176fd6139728918bfd8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute further malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and link farm indicate a likely intent to redirect users to malicious sites, potentially for malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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://xn--80aamwn.xn--p1ai/userfiles/file/lujafusaleniwij.pdf In PDF document text
    • http://xn----7sbqwxdbhblh2h.xn--p1ai/data/file/wugizafu.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16142e2d480e53---46628194903.pdfIn PDF document text
    • http://xzass.org/ckfinder/userfiles/files/33961289475.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/jofafopirojenuremamol.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/bubetekarilifenaxuw.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/54451244806.pdfIn PDF document text
    • http://smart-ventures.ch/upload/Editor_Images/files/sagutunigavigawebi.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa9ac24292---70574228827.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/56058287575.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137890ee4613---77164245292.pdfIn PDF document text
    • http://ieltsadd.ir/cache/fck_files/file/werudile.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/wogafogavulu.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/96672415500.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1614257cabf414---87396369661.pdfIn PDF document text
    • http://telektrans.hu/editor_up/jepototiwipotemudo.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/dijixojaxakisofabel.pdfIn PDF document text
    • http://tavio.su/files/file/98463521133.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1614546b30df75---ruwekeru.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/favidujidepi.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/fonufivosepaluloxifugegik.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/mogizunugijet.pdfIn PDF document text
    • https://poker-fire.de/file/95032863828.pdfIn PDF document text
    • http://zbigniewrodak.pl/galeria/file/80778539814.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=download+keygen+autocad+2016+64+bitPDF 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_off0000c9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A5 11348 bytes
SHA-256: e8d5b9655cdba87a97dc967db724e6c83a392ee2c454c88da4297e5993f6f104
font_01_sfnt_off0000e471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE471 17148 bytes
SHA-256: 00f144f1f15a538a60cb9a133f801138e9dd5c4d30b0bf805701e1184a2cf638
font_02_sfnt_off000110d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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