Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aa9466be7ef93d0…

MALICIOUS

PDF

89.3 KB Created: 2021-06-26 03:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b4e29a451707609c19dbb31ef53db0f6 SHA-1: 093af6ecc20d2d1a616f9f46072c38cdf0e5f592 SHA-256: 2aa9466be7ef93d033a0ccfe86b1b81c1399c289cbc049955f8f1098187563fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload directories and disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://my-natural-style.net/upload/files/23380660804.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/19e46634e894f1ecd671018aab99c6c8/jakelubewog.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16082941833ce0---67549262430.pdf
    • http://vidol.nl/userfiles/file/bisizimetawipijaruler.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/4ad2c51f984f7a8e11e12f0e0288c486/selikusadimiz.pdf
    • http://naplesredeals.com/userfiles/files/41997016576.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086badfd28fc---jotowetupudukadavuvej.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a7ab9406c---saxixipuxumegi.pdf
    • http://komputerzagrosze.pl/userfiles/file/nasoge.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd304125ec3---zajegepezidaxikoxinezox.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/143416baabcaa90cf29ab85f8c90e61b/suxumaxaveguzusasin.pdf
    • https://begili.com/uploads/image/files/97168745711.pdf
    • https://aspaeng.com/files/image/files/sanurezimiwiwo.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/6eb1429270abbd9094a810e8165d7487/lipav.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/a5060187c401bcc8e6510cf7598a5418/69224398587.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/6f97db5bacd8e5872385b7e6ea16c9bd/28190518934.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/7885cd2c75739afb3dd96fcbee57a50c/goseloperofasewar.pdf
    • https://tolgyesvolgy.hu/userfiles/file/detexafumimozoxoxokuw.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/r6gantt0dca491vin3qh1iqlv1/29945791090.pdf
    • http://marthomaiticherukole.com/userfiles/file/vokupivabojomasuradodolil.pdf
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/ponuzovilonela.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/0dk33k7brdr0ugme0np1p1ofu5/bojonop.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f47ae8525a---88301672637.pdf
    • http://amoy-art.com/Upload/file/8487742569.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=mythical+son+of+daedalus
    • 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_off0000f628.bin
ad83a3752ff26355f276e49ab7b1f962ac03a36b851489ba6270764174d3a0cb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF628 19064 bytes
font_01_sfnt_off000127bf.bin
727c762c202964cc0fa2b92314be7ca743961f374cc01aec48a43ec7e606b386
pdf-font-stream PDF embedded font (sfnt) at offset 0x127BF 10680 bytes
font_02_sfnt_off0001403d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1403D 16792 bytes