Malicious PDF — malware analysis report

Static analysis result for SHA-256 208d2fb0a57c4c47…

MALICIOUS

PDF

85.3 KB Created: 2021-07-24 00:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7126ed07a24959e34c6e11a8c5d751d8 SHA-1: 4aad90f61ec06c867b766152e814694065b3ebf8 SHA-256: 208d2fb0a57c4c47335eaa33705c4784f3d9a0cb5d7e06bc2738bdc9c1e2fbe7
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple compromised WordPress upload sites and other disposable hosting domains. The embedded URLs suggest an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acd72576ccf---81180825148.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf15d9771d---mofaxefudadezawa.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/acccf478494b858aed9a0202f2c216e5/75974038212.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d70b386cc5---67507674879.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8d837a505---51507470027.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/1d4651d9df28021ab3de7e9a6231cd84/kaval.pdf
    • http://toyotarent.hk/FileData/ckfinder/files/20210723_552CBC455D056A0D.pdf
    • https://cvconstructionsgoa.com/pharma/admin/userfiles/file/fabukuremibumapizawifusav.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/j288r2dh3ug9qe2ft3o6u3d3f2/92902456761.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/o1j274j2thb5l9ai95eco0s3fs/17178284798.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607355d2e66d2---lotuzigifejiliga.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb3098bdc4e---43882433681.pdf
    • http://signauction.net/userfiles/file/9182061604.pdf
    • https://noriupapildu.lt/ckfinder/userfiles/files/wajupiz.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608135fbaf17f---30578443238.pdf
    • http://j-line.ca/fck_upload/file/19067577288.pdf
    • http://acpiindia.com/userfiles/file/70809483136.pdf
    • http://utuin.net/files/fckeditor/file/tezitenolurujejigizibufa.pdf
    • https://minipowerpack.net/upload/files/bijageliwi.pdf
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/wikoperunivi.pdf
    • http://workcoop.org/fckeditor/userimages/file/20210716055437.pdf
    • http://abbwingslynnhaven.com/uploads/files/duposuvarexulevemome.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=kodak+esp+3250+printhead+replacement
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e803.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE803 16792 bytes
font_01_sfnt_off0001001a.bin
8e34a34746ffea39b8764f896900242b00b455f40e16ffab72630047562e69b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1001A 11412 bytes
font_02_sfnt_off00011adc.bin
c43a9bc8ea1f0325b7b7054395302f9b03fe45fedeff5564ddaf9528efd33aed
pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADC 17068 bytes