Malicious PDF — malware analysis report

Static analysis result for SHA-256 79069e07b1f9e598…

MALICIOUS

PDF

90.5 KB Created: 2021-07-08 05:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d1a0c7863e9718a65542df8c3e9fb2d0 SHA-1: a7b5cb4d122bd57c77f835474d16fda044b5da05 SHA-256: 79069e07b1f9e59821176cf9ec55363e75396687310521b38d866ac22fef0735
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or phishing for credentials. No scripts were extracted, but the presence of external links points to a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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=how+many+ml+in+70cl PDF link annotation
    • https://cafesca.mx/ckfinder/userfiles/files/36618010899.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16086945d4ebb9---mifovikomavikena.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dc14a9d2d---93049007115.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/20876346145.pdfIn PDF document text
    • http://yorktownhs1987.com/clients/57482/File/48122038879.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/6f460989055fec9cdd9bf23a3bf1fcc3/22973623428.pdfIn PDF document text
    • http://www.bandungmesin.com/file/19238344133.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d202d5edc3---mesan.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc56b7b7ba---nezatamemusutud.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/l4scs7tsu19pjdonk0hrvphrql/nifopilapubi.pdfIn PDF document text
    • http://ccsl.asia/files/vulipabubifuvegumasunuse.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/92ff5e6203d8b3c81f1a31781b5f4ebe/90550621892.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/ranceqiqhhv12uid66ughaoges/22133913571.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/72731137646.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/fa9a6283b99366fa6848514631f53cc0/56025480411.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a304ce66a29---gaxixefatoxolojejar.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/87e7892553b5b90aa82f0a77c6f58831/47608477708.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/dufisab.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/82757337343.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/3cfb91ce7a2b25a6b5acfe0e42b39034/50198875944.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809de0bf910---69359792903.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fe67a69f1---49907375163.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/17464985175.pdfIn PDF document text
    • http://giaoducvietnamtv.com/images/ckeditor/files/piwitadazukoleguvew.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/88589338112.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91C 10256 bytes
SHA-256: 3a578e915cc2b022b0d88ce24a6899dcbee2b87d36e7de805f55b353c69d1bea
font_01_sfnt_off00010028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10028 17060 bytes
SHA-256: 93b615f95a175f37bd8540accfa0941b3d7375e49bb093fc99d87ccf578958e7
font_02_sfnt_off00012ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA6 16252 bytes
SHA-256: bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
font_03_sfnt_off00014286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14286 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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