Malicious PDF — malware analysis report

Static analysis result for SHA-256 b16c4326a1d0698b…

MALICIOUS

PDF

79.1 KB Created: 2021-07-17 11:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 11b2d829ab75b86e02052119003b4b2e SHA-1: 3d15985ccf850340dd90167a076ea8938bc0c1f8 SHA-256: b16c4326a1d0698b24010ad51e3f94da0bcde35e7be82a9c84118000e4f30e22
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, identifying it as a phishing trojan. It functions as a link farm, directing users to numerous compromised WordPress sites and potentially disposable hosting domains. The embedded URLs suggest an attempt to lure users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://allegypttours.net/userfiles/files/sutojum.pdf In PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/5b7d9b7265deeebabbcc35265a81412c/53442957950.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a94c4a8088d---rikirigujone.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/lc0kacj07uoh9a0091fpk48fm4/71333707820.pdfIn PDF document text
    • http://bigdoughpizza.com/uploads/files/96693189605.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/pgdagcf15miv8fiv5ubq9uhnrk/35731402520.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca7c15fae1---wedajidonupunew.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb265a0551---lekulipegaperin.pdfIn PDF document text
    • http://debten.net/UserFiles/File/5857867926.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/kezakexedusubapoxi.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/50556568676.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/j4n3jo7fj0r4nuu3rojiodntef/mixibonefusotufopoxafu.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1606f519d3b31b---12493389469.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/koxun.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/49830333973.pdfIn PDF document text
    • https://mimpishiosatu.com/contents//files/6230237337.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/c90fe63c5c887070583bebf822464c21/73587979150.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/8411ef56789874d39f1fe503a3b22aa6/sijaf.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b0327bcfe---jetididesape.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/ce57835a4e4c637b60659555de8eacd2/nowaravumerefavit.pdfIn PDF document text
    • https://lysgaards.com/ckfinder/userfiles/files/26119872377.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=frank+ocean+do+you+think+about+mePDF 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_off0000d2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE0 10844 bytes
SHA-256: f5ab701fd0861875c32d550ec25152f0502dfea1d4a7a8a0858a42e554a7dd6b
font_02_sfnt_off000103ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AB 16860 bytes
SHA-256: 85da708c0b43e9456e937b291f9b03c20458e8c45ca7592e993101383fa3a580

Open this report in the interactive analyzer, or submit your own file for analysis.