Malicious PDF — malware analysis report

Static analysis result for SHA-256 27364988aecee693…

MALICIOUS

PDF

83.9 KB Created: 2021-07-17 17:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9954b08e64bcf3bfbaeb16ad46f06087 SHA-1: f39194641acc934ba9863d71ad2d691a6580a2d8 SHA-256: 27364988aecee6935ac57bf5369fbd20e81341de7535a0ec484fc7ba6202c850
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, directing users to multiple compromised WordPress upload directories and disposable hosting sites, likely for phishing or malware distribution. The presence of numerous unknown URLs suggests a broad attempt to redirect victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16078b39797f7c---73066278717.pdf In PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d92feafec---sisumeviwilolekevaxinis.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/mixanivisusovubilobinopit.pdfIn PDF document text
    • https://cristalensi.com/public/File/423924373.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/runogixupuraxusawilapuf.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/339jv7r2cdukm78cmrd81nmfqs/magopedorodudajukopodefex.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089131fa81b5---19229257738.pdfIn PDF document text
    • http://diamondsnspurs.com/clients/12200/File/96808148708.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c73729a455a---29215345749.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160dc59f73cfbb---xekupa.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078a6617ce89---nezibigukukadif.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/960a018bf42f634ae1ec95195a062a7d/gafazu.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb7b784529---wavoture.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/ba60945afaf678129476dbf21d5fb78d/20543800403.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/0f4ajc81eua1oijgsqsdfiu86s/77664881161.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/gopozokik.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/zavufuwefexedofaxek.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/risebazonorumuvopisakibed.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/56706520073.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/9ha12jt3fjdhsnfh4hs57lvjfm/kivezogatoji.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/mefutisorepebodu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=steak+for+muscle+buildingPDF 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_off0000e412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE412 11228 bytes
SHA-256: 1468da4a90e701d42aafbbaeba69a0a4cf8c7fe00a321f9ca362fa57da10a70e
font_01_sfnt_off0000fe23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE23 17064 bytes
SHA-256: 1cee4cc883c2de29ee85f43a5f2e46750e335da0cd9d8042184eb38e1f93e291
font_02_sfnt_off00012a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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