Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b56af69e27fb20b…

MALICIOUS

PDF

221.1 KB Created: 2021-07-16 08:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5820efe264ec89c77255c5c0f3115bf2 SHA-1: d75accd236b77607a77b0593ab62ffb2af8f6b41 SHA-256: 1b56af69e27fb20b085987fbecee46e427650ebab61d4f829e17aaab5252542b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links pointing to compromised WordPress upload directories and other unknown hosts, suggesting it is used to redirect users to malicious sites. The PDF structure and embedded links are consistent with a phishing lure, likely intended to trick users into downloading further malware or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 5

  • 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.
  • 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://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a430f412a93---kebig.pdf
    • http://uitetenindex.nl/images/uploads/fejarozuretumifose.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ic5jc8omotmd5toksnceatogg3/78436101505.pdf
    • http://chinalabware.es/d/files/nogirajuvevajowezotu.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16080e5c2b6433---gitebaniv.pdf
    • https://rowadalbyt.com/userfiles/files/nurusarisew.pdf
    • http://year-c.com/upload_fck/file/2021-6-23/20210623151910471631.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/bbd7ff6fca2db20c96929e35d856c1b6/nebijuvuxagife.pdf
    • http://scro.ru/pic/file/75244953677.pdf
    • http://snnet.kr/board_pds/fckeditor/2021/07/file/wobutezeladobizado.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/kiei00acjdbhjgv14al7le0h07/pixinozamadelabuwiraden.pdf
    • http://bhhangkhong.com/upload/images/files/zebubakesagu.pdf
    • http://unseretochter.ch/images/file/nisixelew.pdf
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/93156602321.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/oo55vuiiehoavumf944irmugu2/70943723467.pdf
    • http://turagent007.ru/userfiles/file/7682243418.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/14e5f35ae06ff6a996a01ea245cbfa46/wujifukaw.pdf
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771eab4e480---dunegib.pdf
    • https://srilangkapools.com/contents//files/roripagosoputazetugo.pdf
    • http://cocoal.com/uploads/file/54643497634.pdf
    • http://bet-balance.com/userfiles/file/82630709261.pdf
    • https://masini-de-ambalat.ro/images/userfiles/bagusoligulada.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a2e1d3841---93869567474.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=avengers+on+your+left
    • 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_off00030905.bin
f3a3881d4176cafa3011ccbccf1bd56c796d83a7d34b3e89ba4a338d8709d054		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30905 17420 bytes
font_01_sfnt_off00033672.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33672 16792 bytes
font_02_sfnt_off00034e89.bin
be1f5502681699d05b2b3ec77615c0ec538924387ffd8aae93dde2476697966c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x34E89 10396 bytes

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