Malicious PDF — malware analysis report

Static analysis result for SHA-256 876718dac2070180…

MALICIOUS

PDF

76.8 KB Created: 2021-09-06 10:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cf228d4d66dd527a5774224bc0a36fa8 SHA-1: eca0f0f25c196a8d012c417974ecbf3127f56d70 SHA-256: 876718dac207018036fd671ffd4b210f5db974b05c73f4ba0eb2c8e0fb8502f1
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable hosting, likely serving as a distribution point for phishing or malware. The presence of external URIs and link farm heuristics strongly suggests a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://allytemp.ru/uplcv?utm_term=toyota+corolla+gli+1.3+manual+2015+price+in+pakistan PDF link annotation
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607275b64be62---44200331339.pdfIn PDF document text
    • http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/11420915010.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082dcc5a1579---vowibixa.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738974138bf---vovekaniredanudugewufil.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c1999672a---30455937633.pdfIn PDF document text
    • http://energyexcess.com/userfiles/file/50549536763.pdfIn PDF document text
    • http://suncitygroup.ir/basefile/suncitygroupir/files/dojujobuxidapimikeleruz.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/7986220553.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/xurudezib.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/23795327515.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c951a3e4b9a---55575132264.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/budonenagukexodagafo.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/da86c612aea2ac0e89dcdbf6b3366d03/xisonixodafavorola.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/72686674170.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/0299283072d0cdef3f4d480e09c08651/30074195673.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name//files/95384057615.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f61260462---42894635130.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/zezukedo.pdfIn PDF document text
    • http://beverleyannes.net/home/beverley/public_html/ckfinder/userfiles/files/lutejexinomelajozozirafuv.pdfIn PDF document text
    • https://bczenekar.hu/files/file/dajarol.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/wuzapobuvanotar.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608286869a2f0---41459878162.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a487e703---69446373034.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/e97b2eb80a53f107c6680220429c21cf/bavadopozufuwabisa.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_off0000c49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC49E 11652 bytes
SHA-256: d7a248606bed7a5bfee910e4a51cdcec4fc6e89f0eaa1a577c4881b08988eead
font_01_sfnt_off0000e089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE089 17176 bytes
SHA-256: ab2099298935f6552e05b7d863fafce395c67f1d8962a38c7fc0d510e705f1ee
font_02_sfnt_off00010d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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