Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6f6c79f00185f9…

MALICIOUS

PDF

74.9 KB Created: 2021-06-20 12:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86b7b7fdba5268338f228a9aeb946b08 SHA-1: 6ed490355d9d105171f63ca569a40866a032dee2 SHA-256: fa6f6c79f00185f99fc0b755ed655151b2f236b62bdf0d576a6987c20ca849fb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to download potentially harmful files from compromised websites, disguised as movie download links. The presence of multiple external URIs and the use of disposable hosting for link distribution suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dekoblickfang.de/userfiles/file/23376115290.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/ah7iiibi52qod813n3jnmm6tb1/17729115967.pdf
    • https://cortopolis.ar/userfiles/file/32872218919.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac178ed0603---52926771371.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/o08jbn4frd6p38aaeg7i80msc2/dekajutesixa.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/1472a558e6037075939efb8b347d9d93/28554590807.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c0755fd63---jonunepuradupuzeziluma.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16071dc89351c4---fubagexojixiwo.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/94614134736.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c065fdf6222c2d5a8f0a26303c6d153d/sowufi.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/5152ca6834276ff9a611a9ac2003cf9d/xazuwerowadutov.pdf
    • http://bagliodeimille.it/userfiles/files/kesupu.pdf
    • https://ajwatravel.com/wheelmarine/userfiles/file/89718513576.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce4e80aa89---jefifasoze.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/c76a0e2f51d904cf3ac1d25e04fe1ecb/welitedowetuzopebagaxigex.pdf
    • http://www.agenbenangbandung.net/file/gixabosusajasewugegudijo.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f53249a4d5---13681991686.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=ethir+neechal+full+movie+download+1080p
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b6.bin
60820f89e40f5564b4cb556c6ec4695a8933ee37d60afceeb5327b68805934e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B6 5716 bytes
font_01_sfnt_off0000f923.bin
9ec46d1f2bc1bf37d4e17f168c261b209e9b20070fc387e13e37871c56f47864
pdf-font-stream PDF embedded font (sfnt) at offset 0xF923 11068 bytes