Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2a516d63add0c9…

MALICIOUS

PDF

92.6 KB Created: 2021-06-28 16:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 91b95e7c0cefc2804388a89699020c54 SHA-1: 4bf38b71942d1228173782019f739b648c36f312 SHA-256: ea2a516d63add0c9d5ffd60ea1fd23ca91618e99edb52a66a32cdbf6fb926efa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious sites. No scripts were extracted, but the presence of numerous embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 http://oreade-breche.fr/userfiles/file/furesunidufupaju.pdf
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/88755705983.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c76ad894afe---99592328520.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/dcfac99c83b31ce5c7e4f6cee0d2b8de/13052145055.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16072180094762---jovubevuwizoxuxapalivemok.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6bdf012b6---dubuwafizakumazux.pdf
    • https://africanresearchcenter.com/userfiles/file/kofupusolupov.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/348519c0737c5f7ecbc6375988b3b5df/vakugu.pdf
    • http://ehoron21.mn/uploads/files/vifemawifegumusorujot.pdf
    • http://oilandgaswork.com/userfiles/file/94163131316.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/tsblrhhhassfmebjudp29chdm5/kumorotiba.pdf
    • https://healthmatters.me/userfiles/file/fobuboviked.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160811f18b11a3---56727337546.pdf
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/505c45705311a61d02828da6e6b6b603/33142538510.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/bf06cf578e83f41445b57d6ca7ade145/1436145810.pdf
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/103marnef477m1vp6c5s5uctkl/78794015778.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/gatiriwoxipowogabaji.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/0965e14e633fa65caf270bd59f2eeeb4/naxifamatube.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607456372a035---zapilufuwefutaxebegixoka.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/63s14ogmlob3mcoq7n098e1ef9/91144772073.pdf
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/bb1fc5cb23955a43df2013a77b3a36c5/zofubukiromebikuvanugurit.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16085c8fe96578---lanuxixojunenepakowofomu.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/04f84fa1bd05cae2281aebd9fb09bcb6/nefirogapeduki.pdf
    • http://gilendor.cz/userfiles/file/85911323398.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/f2ca3608319a7a46f10e1e27db232ce9/8123048583.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/aaf9e41ed11b2f8e694e106aa0970639/dukaramaguluzazasubotore.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=all+the+tides+of+fate+pdf
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/d585a094c6ece017955e9ff3cae8ebc7/89216915715.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_off000104ab.bin
d32c8a7018614ad741975441579c839305c9c99a99b19bde37c900502a2c64c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104AB 10372 bytes
font_01_sfnt_off00011c47.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C47 16792 bytes
font_02_sfnt_off00013459.bin
96b787fd383a27f0b2542de4da1331cbc71ec4c598e826f142a1a11285c95579		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13459 17900 bytes

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