Malicious PDF — malware analysis report

Static analysis result for SHA-256 41d48172fc395a84…

MALICIOUS

PDF

84.9 KB Created: 2021-07-01 19:30:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: adcb7782386315e99703171681981858 SHA-1: 55a4a2b12239a771519ae4aec06df564e4249ba3 SHA-256: 41d48172fc395a84f4d452c6a36aae24e36074cf08c9e9f35353b974ab4401f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and other domains, likely for phishing or SEO spam. No scripts were extracted, but the presence of numerous external URIs suggests the primary goal is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://crysiq.ru/uplcv?utm_term=letter+writing+format+in+bengali+language PDF link annotation
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076a59fb3818---xezuzeduwipilakijixuzu.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/2r22u045cc5gfeb0f0gq69nd00/5967379786.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9bd548a47---tenuk.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/dawufosujesexi.pdfIn PDF document text
    • http://honda-vo.com/upload/file/xoxudewilajil.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609103d72b93f---kolegidutesupomemekuvogol.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/zovadoxir.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/7rfnpc2sc6b7ku60b8gtl1hbu7/40592539618.pdfIn PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/35560738744.pdfIn PDF document text
    • http://centonze-vini.com/userfiles/files/paxaxajupevisu.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfcc13eea9---31258054388.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/30994955622.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608129c92ba29---kobepomex.pdfIn PDF document text
    • http://magnachip.cn/userfiles/file/20210516052524.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/m40tg39rpariih5jgq0a2lp05n/tumajiji.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0d345b295---wokewaranaxumadasusexu.pdfIn PDF document text
    • https://nasselgrundet.se/anvandarbilder/156/files/92531914651.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/ginijuviwopalid.pdfIn PDF document text
    • http://supair-lux.hu/ckfinder/userfiles/files/88198705040.pdfIn PDF document text
    • http://toonesk.com/upload/fasete.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/mirotumupowilila.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/gho780lmpl4b1q22o7vtvgc61j/92655066241.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/4n3arnothps89uq8c9mcneo293/popuwowekubokovisu.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_off0000eaaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAA 10672 bytes
SHA-256: f52c15a149dd51e06de88e4851ea6ca9cf5d189a3bf72c70555b76d2da59eeb0
font_01_sfnt_off00010328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10328 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3A 16584 bytes
SHA-256: a6d890212d16b89ad9142a9b6e8000d70004136a49973969a4fd01f19a608faa

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