Malicious PDF — malware analysis report

Static analysis result for SHA-256 68cb2c2a61625c39…

MALICIOUS

PDF

106.2 KB Created: 2021-09-01 19:36:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0e9aa2b8e7e986635c5b6a089083a90a SHA-1: 87975f408fb9e8c9fa3b5c885a684ecc75e78ed8 SHA-256: 68cb2c2a61625c3953de7dbc5db070834b9d68e6e3127a88faf647717f007b8c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous embedded URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The primary purpose appears to be redirecting users to potentially malicious sites, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://study-abroad-travel.com/ckfinder/userfiles/file/60249573619.pdf In PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/d18fb4eb92a104ef0d44a48ab65d05b7/15287030471.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/waboxabixisalugi.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b82763e5196---tokolufigabimumofixero.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210524135137.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/panufagololofezumaxag.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/60uedje8sk06trs65dc1374ngj/mufugomekule.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/53086537578.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/vijapakulitamejikeboneza.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/21135329884.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c90806a974---15783001950.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/80142270922.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/45106978364.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797c0bbb928---zoseradanomiwifuxilu.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/kafulobewibe.pdfIn PDF document text
    • https://patc.fr/imagesfile/27626810832.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/07/28/file/gumijide.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/99332176858.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/1742891897.pdfIn PDF document text
    • http://chrisdepanneservices.com/Sites/cds/files/lokofeno.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcbea4ac23---45239693931.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160ba58ab501b3---42802569583.pdfIn PDF document text
    • http://bakefruit.com/uploads//files/202108061149393015.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1609b76139f97c---fejupasusejobanemux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=numericals+on+projectile+motion+for+class+11PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001350a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1350A 20040 bytes
SHA-256: 0194b4ccd868495a74bfd44a20634398aa5b3d405d35cfcdaabd96c0f86d1219
font_01_sfnt_off00016990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16990 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000181a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181A7 10900 bytes
SHA-256: b3a9e59a3ccd527308f8a2cba84ab768d8998109b4788ad1f31092284492f36c

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