Malicious PDF — malware analysis report

Static analysis result for SHA-256 74a6d69947a26ca5…

MALICIOUS

PDF

89.8 KB Created: 2021-08-12 00:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0a1ec018dde248237fa5ae03be3a3b20 SHA-1: cbecd775fb3986db9f3e5f84c443e00f7c2a19c4 SHA-256: 74a6d69947a26ca53df629ad1a368b7444b08136026b75d6ef9bced75fba3e63
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to domains that are either compromised or appear to be disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic confirms the nature of the links as a link farm on potentially untrustworthy hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jjkxmy.com/upload/files/202108052133218929.pdf In PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aa32cbc7a62---13549671497.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/64314895704.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cce16032c2d---puzizepo.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/80826956916.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/75463586252.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/35130955262.pdfIn PDF document text
    • http://xn--j1aii.su/userfiles/file/30927466375.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/f48v3frph15k6tqkgioha3obod/17196064366.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/bec3283ff85bc511fddbc21c3f405651/lowapasuvogut.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/4n4b8jf467djbf4j97s69lliq4/vuravuvularejedukuton.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/ba8da8c9e01a37f54c1ecd581e6c5bd2/16795848278.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/mijunefosewozaze.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1724a9ded7---5923821651.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/xotujujobulose.pdfIn PDF document text
    • https://naoshima-habitant.com/75315359204.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/lajigufomefusevedugatova.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/vivosenazugafivoja.pdfIn PDF document text
    • http://soupworld.de/upload/file/tenawogasomeko.pdfIn PDF document text
    • http://massintech.ru/img/outer/files/botusefinotomiludumak.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb564b0ad70---fusajir.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606caf7c7db5a---zogavopixazo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=palabras+de+despedida+del+grado+cuarto+para+quinto+de+primariaPDF 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

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_off0000f6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A2 17908 bytes
SHA-256: 559a000d40940c18ddd64b69aa74bdc528363d774d545037546a3af498f5eecc
font_01_sfnt_off0001241f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241F 11244 bytes
SHA-256: 85275a06c97b70b9d77e5c369765c437b201c2e5195af6eafdfe7ab34102f8f4
font_02_sfnt_off00013dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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