Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aea600b92412cc3…

MALICIOUS

PDF

84.4 KB Created: 2021-07-03 14:35:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0b2f912f4682501f470a189be55d13a0 SHA-1: b6e54e62e9db21d4285bc1a33202623199dce0e5 SHA-256: 7aea600b92412cc34387db48b128513ee8a2b826d3278de28fa498a4bb1eda41
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports a phishing or social engineering attack. ClamAV detection confirms the malicious nature of the file, likely a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://pixomot.ru/uplcv?utm_term=2nd+puc+sociology+question+answer
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/aa8c0baddd1ffbb2bc506a4b3af885a2/16324938296.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b4050f85243---29317887988.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e020670dd9a---xuwogewafujedizurivuz.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/d4d531ebf35a651fa3b449fb57d3b1fe/17543000964.pdf
    • https://china-glass-mosaic.com/userfiles/files/20210611_104204.pdf
    • http://jinanxintiandi.com/userfiles/files/vokaf.pdf
    • https://tramtron.vn/uploads/files/files/33462243632.pdf
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/7ad80186c54db5e9cb86472d1e766128/nilenak.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/01ihq6jghp4n8p300ifmamin72/xerodude.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/24266339429.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/e0e33c711fefd2c368e6c4d61f884fd2/suvimutumenu.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/08ed9f314b7ad1656c564267efcdce8f/toxomejosopawobifen.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baf98c0df15---97132880146.pdf
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/6jha5ef038hb3insecgr5q7ujn/xakidizopimizonanawikivu.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7c05b878b---tifomanewunovudumiz.pdf
    • http://sarljarry.fr/userfiles/file/xomepeduton.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e420e520b---66078123045.pdf
    • https://ilcaminodaugo.it/file/70990415985.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/b3b54fd0c4d4d8e15261f306d419c3cb/55472824691.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085dc772c8c6---wibifotudugululi.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/f719c0362b2a36203f0de93e6f34c57f/75805681291.pdf
    • http://yakutiaprime.ru/SITE/files/editor/file/suvamizopixopepowaget.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/a8fb0f6b4bc847b9f725dacbeb392278/miwalixakisiju.pdf
    • https://lecapsuledigian.it/file/85274269587.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e625.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE625 16792 bytes
font_01_sfnt_off0000fe3c.bin
74febfac9f7624952e39bf0dd6315e753a338b0c3c43c91f548c19f79b5fbb4b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3C 11160 bytes
font_02_sfnt_off0001180f.bin
3f8b6165d51085b90fbdc0fb420d98c49f726ed632092ae0e2bf327584d141ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x1180F 16920 bytes