Malicious PDF — malware analysis report

Static analysis result for SHA-256 07db46cf897fa96d…

MALICIOUS

PDF

70.5 KB Created: 2021-09-01 06:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 104c266dbcad7648f9406e60f761b605 SHA-1: 676e577d848bd554448574fdcfb602cf9b79bee0 SHA-256: 07db46cf897fa96d2fbb6c6187e53cbbf29ed09f0dc4f89e723ee90a79f3ab2e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to various websites, many of which appear to be compromised WordPress installations. These links likely serve as a link farm to redirect users to malicious or phishing sites, a common tactic for distributing malware or stealing credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/3bb693d0e830f46ea8b414ebf94448f7/26198396155.pdf In PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160868fba1cf59---77022499668.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/aedeb541f07a72991557cb3a93497e43/40694200030.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bf5c1d89511---61215445790.pdfIn PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/vakivabedamoniko.pdfIn PDF document text
    • http://menloathertonhigh1980.com/clients/6/6f/6f83464fe0b13873896cace574d4baa5/File/dezezojuxak.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/magogu.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210709_122613.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/71002563258.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/9948738843.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021072006210273499.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160be56a8982a1---vudowagijuguxirumiwav.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608078d63a561---36506528654.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/07188c2806a776db1cc59c09f345ead9/toxunobavinutij.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/juxudorenud.pdfIn PDF document text
    • http://velo.hu/UserFiles/file/63503988981.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/81964364597.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/nokekavodipoxuva.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/vesilaninovumexunifu.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/xumufiwosoredivuji.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/47471404152.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/verularibaluda.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/77231468183.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=laughing+yoga+for+stressPDF 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_off0000b6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6AF 10620 bytes
SHA-256: 0bffe7597080da1b7f107d7468cb0f7a903758dfa44f432975ef1d4e9f356c04
font_01_sfnt_off0000ceed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEED 14804 bytes
SHA-256: aa422d86a660a87f1189389a8893ac1b920c5789c98c0f4630df05eb0f0804e8
font_02_sfnt_off0000f46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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