Malicious PDF — malware analysis report

Static analysis result for SHA-256 3071a1d0275f3fce…

MALICIOUS

PDF

88.5 KB Created: 2021-07-18 00:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 680e60154d0c812220a0a6f66aa50563 SHA-1: e911ee501c5788f5329b941f233b0598eeaf47b1 SHA-256: 3071a1d0275f3fcefac3a2de3618911e602a7746671ff3b03baa48e5b6814284
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier also returned a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/onhu3t5h77q3k1fcki1v9h7ugk/tukixumorelu.pdf In PDF document text
    • https://noblacklist.pro/web/img/podborky/files/fevugel.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dimesedajufunagel.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/74925693644.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/bhte653vreboql1bp6t045sirl/99439009054.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083487795ffa---57222762018.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/foximenekize.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/fufixudafifopitubokokesu.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/v556hqdho198pjagg0783evh7h/risijofebemifuveluvibudi.pdfIn PDF document text
    • https://serpavenger.com/ckfinder/userfiles/files/52422922980.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ed79c1784---kaxotabenunivojareb.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/481986fdb06954eef9c3e504f62a184b/bugekevixazavogokabofeg.pdfIn PDF document text
    • https://777mto.org/contents//files/fugususezeditewik.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8633735f76---wabilevagipijezubejilunil.pdfIn PDF document text
    • http://inlygiaylynhua.com/upload/files/9851064762.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e2c5b6e82---gavobebanone.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/77333453073.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/97834359679.pdfIn PDF document text
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/7f92ac283228cc15aa8c13890bd62c8e/16797453373.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/firozisusasaragojo.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/tq7ubvmecvvnfaaphngdr368c6/xiwipelaterolugusiva.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607123a1519be---suposijoxuwekujenosin.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/mofizowovigotexijobukane.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f6f607af4---dadesigagobibatotu.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/107e1ccc5977c9754314d1a01c4a55d5/ketilidonolozewak.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/3dj7ukfgc66q3b0fmfvqimrc46/62882883404.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=list+of+neurotransmitters+and+their+functionsPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C6 16596 bytes
SHA-256: 0efa67b72e8e384afc30d7f770131e7e5adf74839f754a4b616f8e947868a576
font_01_sfnt_off000123a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A8 10752 bytes
SHA-256: 52b3ff8633eb80ad5d67ea5ac3b1e870d3b51ccb78a75afa96b084e69e4e1477
font_02_sfnt_off00013c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1