Malicious PDF — malware analysis report

Static analysis result for SHA-256 01dafbd2fcbd90a7…

MALICIOUS

PDF

82.8 KB Created: 2021-09-20 03:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9c4f3a523879dd76386adfce64b0b125 SHA-1: 49766f1857e9163b7109a36465977f6fc2c771e5 SHA-256: 01dafbd2fcbd90a79a375f6dea9103647968b7b12b004cd82c2c87a6b7017d1b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to potentially malicious or unknown domains, suggesting a link farm or redirection mechanism. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to lure users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gberwanda.com/gbe/useruploads/blogs/files/kizuzom.pdf In PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613268db66140---redolivozonopilalojew.pdfIn PDF document text
    • http://4bx.pl/public/file/35130841941.pdfIn PDF document text
    • http://fishingas.com/userfiles/file/sekibirixofolagagirameg.pdfIn PDF document text
    • http://gnox.vn/upload/files/15644242468.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/roratavakifazozivosigaza.pdfIn PDF document text
    • https://peperita.it/writable/public/userfiles/file/10047486771.pdfIn PDF document text
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/bitivubeburiwof.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/4097240122.pdfIn PDF document text
    • https://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/9148244909.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202109172135052914.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/88903471083.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/ganevejekuwebasu.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/viragida.pdfIn PDF document text
    • http://platcometals.com/images/file/putowupodi.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///gamoranu.pdfIn PDF document text
    • http://medtravel.lv/images/hand_uploaded/files/49252845812.pdfIn PDF document text
    • https://petikdaun.com/contents/files/83718358527.pdfIn PDF document text
    • https://hahapediatric.com/uploads/files/202109190147362136.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/28058778021.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.com/userfiles/file/37275870913.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/kanesagukufukejejifogu.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/no8k98p8fvoaarmr6j0opvhfl9/78782750588.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=bombitup+ios+downloadPDF 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_off0000e066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE066 17408 bytes
SHA-256: 36ea040b75634c2eb6578b15157c7927c6744a4154bfddd2652578e91407f983
font_01_sfnt_off00010d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001253e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253E 10700 bytes
SHA-256: 0fca1e673a5665e4bddd1cac7c92ee8819bd8d1dc00b021aea86f87b22dfa81d

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