Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d29d62ed8db1a92…

MALICIOUS

PDF

76.4 KB Created: 2021-06-27 13:30:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f031f801d3d569170acf7e09d5b198d SHA-1: 84a4d5b3259a600201f63ca6fa2c00ef899ce575 SHA-256: 0d29d62ed8db1a9268b292b476f5c13477b213747f2c95c3e5c90c7939334f81
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The primary purpose appears to be directing users to external, potentially compromised, web resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://ahdongjiu.com/upload_fck/file/2021-5-1/20210501084913584242.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079caac236f2---wexixiberiwokulo.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/31isc80240in918bi6p7phmh9l/52179973195.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1606f507b3c7c8---61847564501.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098b18d7f2e1---84837149792.pdf
    • http://ajivikafinance.com/userfiles/file/14223036025.pdf
    • http://gancza.pl/userfiles/file/xirunodakevu.pdf
    • http://drapikowski.pl/uploaded/fck_files/file/41458907696.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a418fadc2a6---96019993052.pdf
    • https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/6540d4bfc44cb459738d60a6019cb303/pidosudadifokevik.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/7t9el9g9ri001bd80kcpf62ip6/54503475076.pdf
    • http://rurisnet.org/images/file/71739246028.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/ciae34e2udp0sdjqsakupsdf05/84632863850.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607731cb348f1---89339961067.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/avtetuuokee1u98lemf4vnurh6/diromef.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c8411c526---60983596892.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/3f282301890f1d0dc568b9f77804db61/6971528017.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/ef7d1dbdf19bb37b6389543a7009c7ca/levoredujuxepekikotaxuk.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/hq0ocng705c7lh3f5u55dk717a/guwij.pdf
    • https://emilline.dk/ckfinder/userfiles/files/tamevabubuwexo.pdf
    • http://brandnewgoods.net/userfiles/file/vedadilifudobatu.pdf
    • https://codecs.ro/images/file/74123846209.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/cce8de6549337140ae2cb8e1be63bac1/votafulo.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1608019008c95d---96267490034.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=baht+to+cad
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caa0.bin
03b6ea48cf1cd71b1e0e9e2df22a0b0c3da0ee2c78920d103e3494d5475e2090
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA0 9876 bytes
font_01_sfnt_off0000e084.bin
9c6aacc5ea83e5f168d6ea6a3a1ec52d53febdab6ad0b219ba5d0ada9273eade
pdf-font-stream PDF embedded font (sfnt) at offset 0xE084 16924 bytes
font_02_sfnt_off00010c8b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8B 16792 bytes