Malicious PDF — malware analysis report

Static analysis result for SHA-256 b422417abec71287…

MALICIOUS

PDF

104.4 KB Created: 2021-06-30 06:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 747655b3265d97315031e6517a235f12 SHA-1: 6e4feee4ba9cbd41c2237e40d36125f2a1780302 SHA-256: b422417abec712875d9c93b573aa0b8ce6c17f4effd3a7e342b2098d076b202f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as a phishing trojan and ML classifiers indicated maliciousness. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS upload storage and disposable hosting. The document body is heavily obfuscated and unreadable, but the presence of numerous links suggests an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9687

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://adbuilder.at/ckfinder/userfiles/files/mapevujewetogiwub.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/61ccea319bc09dd178ac9fde0c15701d/vagumuguki.pdf
    • http://bendhorseride.com/userfiles/file/30664819203.pdf
    • https://buka.ru/sadm_files/tapurupakodoxufunefinobax.pdf
    • https://camping-du-lac-dijon.com/fichiers/57599486054.pdf
    • http://extracam.es/app/webroot/arxius/file/zizifagezi.pdf
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/5e815e92ba7ca0aa51394255a475d873/95095911909.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704d44d5090---39893517570.pdf
    • https://cape-electronics.com/media/file/surudabogeganolipeweneja.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/4c474a80cc8e65c66a92285b7f929688/xavetemajekibub.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/14o7o8r2ae4le23kt7b0lhade7/25660881688.pdf
    • http://ash-graphy.com/userfiles/file/73653992188.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/upae404993fhec3v9f763il2qk/22130176159.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/gu55tmufngvgqqhoraeq7jp7q9/35627415946.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c95281dd287---59072020563.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c1f0c68c---16314632571.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/ed813c9cb2982610998dabbe9c140321/43035497488.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7c3c7c201---95326474638.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/b955378e086c800f4cb2564c43965ad6/tuxabetivefodesakakugemoz.pdf
    • http://driver-jazda.pl/upload/file/wagesopasokenika.pdf
    • http://szpital-sulecin.pl/images/fckfiles/file/71269828609.pdf
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/dorivipilodiso.pdf
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/pivoxorepimotogujareju.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=meaning+of+moat+in+english
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/41718d962956589d3a8425522f00fa91/xuzawurixemis.pdf
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010282.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10282 16792 bytes
font_01_sfnt_off00011a8f.bin
75eb83a5d05af83a97120385256507c8d354bcf8e191999d37220902e00dbc32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8F 3916 bytes
font_02_sfnt_off0001298c.bin
e5959a94792108050176d56c7833a9710a6c501b18f9d663c29ccdb8eea69f28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1298C 17704 bytes
font_03_sfnt_off00014460.bin
9ff9283bf004e9a11bcdb33357e0fca156f5a8b1f5a1b62059dd0fdf683de8b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14460 20932 bytes
font_04_sfnt_off00017997.bin
1c81d7642e235cc5853aa2c36f671892bb36e78387177164119f649dc87c1dd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17997 10552 bytes

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