Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2a907b6c3ba9da…

MALICIOUS

PDF

87.4 KB Created: 2021-07-30 21:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 38bc9001045211008b738f9657e0cc06 SHA-1: d34c194a2ce87c5bf792a4e7b077fdfbcd6b050c SHA-256: 7f2a907b6c3ba9daaca061b0a89312b7d0ccd7f1a96b12a9776c7030664678bd
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links, many pointing to compromised WordPress upload directories and other potentially disposable hosting, suggesting a link farm designed to redirect users. The primary attack pattern involves directing users to external, compromised sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://allycatering.com/userfiles/69170141276.pdf In PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1609c43e745680---nifowobifovalo.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076494e7e31e---gitikenezumibomugeruzapub.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16086ff34da9b6---kubalofetokivi.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160bb242b86be6---58455680383.pdfIn PDF document text
    • http://vejwun.cz/images/lasejiwokupunuzozaz.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/3c9678c1a1141f4d20118e88811f1285/kedasoboxume.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/4742665710.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fe43604cf---rabekunudemegukem.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/kofutejegovuj.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021050520272912.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084939317bc5---16216039750.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/btb44v0tka07l96p7k56d6k1d6/5825861658.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/18129169623.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/vggahfg7306s73ee38ouenm30o/95479078932.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d43d88d43---39339361168.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/hj1a56b03l9pqkkqjisoaimljq/78015261537.pdfIn PDF document text
    • http://chonburi33.com/userfiles/file/likoxagelodipal.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160ac86856444a---32069645209.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6760ee0dc6---26994019610.pdfIn PDF document text
    • http://pandoreunion.com/clients/81456/File/16231954597.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/biwefegun.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/riributonevegemawo.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856229f0323---nenupefasodoxiragi.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/gobesazivevum.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/34266968210.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=interstellar+piano+sheet+music+no+time+for+cautionPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE623 17576 bytes
SHA-256: 8493323ef70549e2467f61bd49f57a32b95d401caac0d6053e9ccb2e130ace4a
font_01_sfnt_off000114bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BC 2184 bytes
SHA-256: 258185301f5c187fe64772610f194eae19a2f5abdb8965c236307dce91ee621b
font_02_sfnt_off00011e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13687 10796 bytes
SHA-256: a308c4d4adb20eec5cde6701a30f54720680d4c5f3bbefa4e326a9d6529864a7

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