Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae2a10a64fbc577d…

MALICIOUS

PDF

114.3 KB Created: 2021-07-01 21:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 88d4bbd9acead7817e2f55262dff8f22 SHA-1: b606c532ef76e0589d3d19bd357c659415eb33f2 SHA-256: ae2a10a64fbc577d9a04385a9a8c4156acceefbb914e8cd4948648bfd1088735
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised CMS upload directories. These links are likely used to host phishing pages or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ba4e31d64---94191842791.pdf In PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//wejefunalezisoba.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/buvixokagajobul.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/snphpm74b0gq96jqcto4dqmviv/98194855625.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2a708a8fe---lojavudokuzijudisabim.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/76f450aa115d021c261b32938972da9c/39863838090.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210608234945_ph7ewx.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fb80432ea---javinanafivedipipuma.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afcfa791c07---89704794820.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/fodone.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/27077612983.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf26fd4610---78299317295.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/42301962609.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839a5621ca0---8061652599.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/fc65n2v0klfob975ignfth8ii4/ligos.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7b64cfd1f---kavugafozo.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/cu18jfinjd0rlalm8sbbak6tm1/50414403779.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/una0iquurukk2vb707gtmkbsbl/padulowojazetojiw.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/f98ce5975aba876e9f40ab1ca6b6b711/titasimironekisab.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16089c79b1f747---12567673837.pdfIn PDF document text
    • http://www.kilincsweb.hu/fileok/file/89788760759.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160909f4a351a6---kepowividov.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b0cd8e850---nebolofiwebi.pdfIn PDF document text
    • http://sanmargholidays.com/ckfinder/userfiles/files/fudalavujejese.pdfIn PDF document text
    • https://ratsimae.eemedia/contents/file/vijatuvowotubilol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=folktales+about+the+seaPDF 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_off00015ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ED3 10216 bytes
SHA-256: f3e39b56fed7102208e994e7077c2ca22ecc4da0f1f65c5eef801525c68feffc
font_01_sfnt_off000175f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E02 17808 bytes
SHA-256: 34cb90dba87f3a24ea64020bffc2411fb73e37fcab56eafb17d656616d1ce425