Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d122603fb5fcf69…

MALICIOUS

PDF

84.0 KB Created: 2021-09-20 21:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 4564ccd7c2b9b319515998698cebdd6c SHA-1: a5b05ee3fa1f37cbd240adfb34cca2d1c62a8fc9 SHA-256: 1d122603fb5fcf69a6917ed1c706b2410e22ba124559eeeb4be4a0f3d5144ddd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external URIs and links to compromised CMS upload storage, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pixomot.ru/uplcv?utm_term=kindle+fire+manual+free+download PDF link annotation
    • http://dsagco.com/Upload/file/17964193835.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/69077885068.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/faxur.pdfIn PDF document text
    • https://eniedu.com/data/file/20210920171334.pdfIn PDF document text
    • http://rsentco.com/upload/file/42408780055.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/23084900820.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/3784c8aba2e50fc165ce96d90fdf77c9/83678356991.pdfIn PDF document text
    • https://m-audio.vn/img-m-audio/files/89286327201.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/64083903592.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///19509515212.pdfIn PDF document text
    • https://webrekruit.com/php_codes/Scott/VieauAssociates/code/userfiles/file/81437585982.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/36226286913.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/79995499756.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/zerizajaniko.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/tetafezuwuwarumugak.pdfIn PDF document text
    • http://zjleiou.com/images/upload/File/48205994095.pdfIn PDF document text
    • https://rwd1.thadv.com/upload/files/89822780744.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/19068662608.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408bd34ced5---3150254278.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/dalusigiwepoxusura.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/25907714810.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614012c468d66---xetixokari.pdfIn PDF document text
    • http://gzmzwl.com/Uploadfiles/files/50578345221.pdfIn PDF document text
    • https://alwillislifecenter.org/ckfinder/userfiles/files/megodu.pdfIn PDF document text
    • 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_off0000e206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE206 18380 bytes
SHA-256: a18ef3ce879f3b5eea70db6ebf26535e35359dbf8a4ed838f56dbab114184cdd
font_01_sfnt_off00011252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11252 10424 bytes
SHA-256: 047e42a60a4d197d6de85e9ae1502a4fcce2935822c3080ce9c1d316e88b06a1
font_02_sfnt_off000129e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1