Malicious PDF — malware analysis report

Static analysis result for SHA-256 0600045f896d0151…

MALICIOUS

PDF

92.6 KB Created: 2021-09-04 04:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a28aceac7186c50d6e897372616abedd SHA-1: 1e5538026667bb3253c51f38413193ceb0f803a5 SHA-256: 0600045f896d0151f6e9f85f2f58f16d6357b848653d33369e4abb13b802a20c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised CMS uploads, suggesting an attempt to lure users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://monographie.com/ckfinder/userfiles/files/49517647091.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/pu1a5juhjplg26uohq6rttpi2q/febizupi.pdf
    • http://menloathertonhigh1980.com/clients/6/6f/6f83464fe0b13873896cace574d4baa5/File/41139059706.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/mjs5fbgau950oj8n4lj92j23n7/59137798086.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e20b5e8df---lowanusuvosirajaji.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/9tcmjvfkhtll17hbofdrfte2m4/32858464927.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e130c19f9b8---75822749028.pdf
    • https://odlingfamily.com/userfiles/file/zedabososonopopevojakiriw.pdf
    • http://highlevel.pl/userfiles/file/25432356510.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bddde21994e---feduwevufugojajusojeri.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/1dcc896150d58eb7292fc3f8815379e4/vulisinogirejokozasavun.pdf
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa822a579e4---54864311289.pdf
    • http://goldenbaycruisesagent.com/userfiles/file/87025543455.pdf
    • http://sushiloverca.com/uploads/files/kofalufumaxaxetitufiketu.pdf
    • http://ros-grad.ru/fck_editor_files/files/68830764043.pdf
    • http://tsrmvolontari.it/userfiles/files/99297763063.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b884e6421---lokalefivude.pdf
    • http://workontext.ru/media/file/romirixusomajosedog.pdf
    • http://pinxedien.net/upload/files/9022856904.pdf
    • http://xedaptap.net/userfiles/file/webiwepafow.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=structure+of+nigerian+economy+pdf
    • https://mediaget.com/userfiles/files/19567469247.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_off00010218.bin
3dc7597750e035f6ed1a6d6419c14f7914f1bb5c441e00e89bbda31aec1c7d8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10218 18672 bytes
font_01_sfnt_off00013303.bin
199610fefcd3fa35250dffe96d418212ac933da70f654ec6a80160ce4e1434eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x13303 11040 bytes
font_02_sfnt_off00014c92.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C92 16792 bytes