Malicious PDF — malware analysis report

Static analysis result for SHA-256 de162ada51306d76…

MALICIOUS

PDF

103.4 KB Created: 2021-06-29 15:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 44beccecaa9adbb69f9d838f57e0bfa5 SHA-1: 9b7040fb4baa4c2afd8f7459ac0c22cd9cfa60a7 SHA-256: de162ada51306d765a14bdb9135ae4759f90826698fdab57d0f0a859dd24d8d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm hosted on multiple compromised websites, designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the URL structure and heuristic firings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://markzone.az/wp-content/plugins/super-forms/uploads/php/files/t8mevb6npn6rn8prg8i983omoo/86638266308.pdf In PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073a0491e835---zexozubefoja.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/52257083435.pdfIn PDF document text
    • http://parkhighclassof60.com/clients/871169/File/xagopanajejagubejumifon.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/b92cc3037141e7d840a2e49850b0c6e3/87652701758.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///zazabotofugowutogavefog.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/tenofilupuwavanisonumaw.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c460cc698---10912552045.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd050f1411---72083136374.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a93e89eea5213618c7a31078a18cb355/jozoneruvigibeful.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//nukufefefekuwokadogu.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/tamab.pdfIn PDF document text
    • http://gptools.net/userfiles/file/31481719159.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/wezagidij.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/vgsao1n2g8mv3ge3eq5d5621j2/57664534826.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2b7c91057---18170132294.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34ba1320c5---sitikogitagorodofalote.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/78262162643.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adbbd86538f---demusi.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160adb2df8687b---59285195399.pdfIn PDF document text
    • http://robedecreateur.com/img/files/regupifogirovepetexapu.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/bf97e8v09m28nifo4fs84la3lg/suguruvowetijilak.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/8dbf9537e5067de1d7e5db4c5c6a213d/31247929228.pdfIn PDF document text
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/xudiwezidamulekajosepo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=verses+about+quiet+time+with+godPDF 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_off000132b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B1 17200 bytes
SHA-256: d219a5fd33a1644ea15edace6b57752d2cd03d1bc56bc43a45f40b8e4d3adfa6
font_01_sfnt_off00015f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F18 10988 bytes
SHA-256: cec441889def2680a635c8d1e6b8cb6d48c60fe945dba4ecc7e01d15f3f7c65d
font_02_sfnt_off00017837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17837 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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