Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e3bc70b8f5c472b…

MALICIOUS

PDF

102.0 KB Created: 2021-07-01 17:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 846a29b2ffd51691a323889230286097 SHA-1: 6d44d489f8079e8d0b8f9fb4519d1bd6e4b6be74 SHA-256: 9e3bc70b8f5c472b0ef6890e22740920a926ea675789413bb33f566732d29e7f
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress upload directories. This suggests the document is designed to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce5ca8acb78---46945395245.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16076ccb16f23f---dufazekoliwezoxofozot.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5fcaae97a3---35745117698.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0d4b4c714---fisiw.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f14e394c8c---80865376775.pdf
    • http://cityhighclassof77.com/clients/9/9e/9ea685038b5a197d2022a69b8c6b162a/File/27144130208.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f1605db55---69884689099.pdf
    • https://tvsporedi.si/vsebina/992245849.pdf
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/294d942198d5486d054f83df5ef21312/82428410495.pdf
    • http://thangmayedex.com/webroot/img/files/61617518177.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/54da0dad0c6e57c4089d77225861f72b/saxomixusizefowisiruxan.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc73cf0f8e3---98691322043.pdf
    • http://qytbearing.com/upfile/file/wawuwunis.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5fe00c8b6f---widagedurokasanano.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a866b269246---95126479973.pdf
    • http://bukharajohnscreek.com/sites/default/files/file/67974078346.pdf
    • http://www.dean-cpa.com/files/adminpic/file/mupepuviluputiruta.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609214d12c2a3---84499682978.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98b94cdf1c---26369633618.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085083ddf0ad---22690460263.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a677a58251e---46134345408.pdf
    • http://royalrep.com/userfiles/files/falevakedexusavawimiguzar.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/9ae2c49689badca302118cd52f3795e1/75742416805.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/1p9buvcrsjd28etdjhr2slno1d/lupozobodilete.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090f6944a9ff---tafaragogemi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=types+of+tooth+abscess
    • 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_off00012d8f.bin
054647d1a8dc8c8ff2ff985bb5991fdb1b0fc0f8fd481ef14731210551e1d19d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8F 10452 bytes
font_01_sfnt_off00014549.bin
0bef532dadc854c53b57cb29362617240243b03d2bcb8b7d5965bf6c050e41a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14549 17696 bytes
font_02_sfnt_off000172a7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x172A7 16792 bytes

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