Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f5a7aee8c2c73f…

MALICIOUS

PDF

92.7 KB Created: 2021-06-26 14:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e9ede89da172b2e6783ca4c5f8672b86 SHA-1: 4add4c2b499dbd77f5db22c2bce312dd11536843 SHA-256: 95f5a7aee8c2c73fc03115cb5869148558c34768c7b8ffdb46b0204a4a99a9d7
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and numerous external links align with techniques used to lure victims into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/dfefb20e53b90d0d3f92cf794b73583b/motaw.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/c916a00bc3e9941c97456b3d57e8020a/62335482801.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/dt4c8m6ftufb2gduvjc88bfj83/kojadufolikireror.pdf
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/c3gisdju21ovf7ah6pntpe81l8/riwetoweveluvipaxaf.pdf
    • http://g-shocktou.com/user_file/file/5948176349.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad965550137---33167992636.pdf
    • http://vantaibactrungnam.vn/upload/files/mewilasusanibejadosasiloz.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/fklpu06t0tc5f8vtgojhp8te56/kezafebozixi.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609c888bc5571---xuwuwuwawajalazan.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5b4ceff04---doronitebigip.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc68115209---68291983900.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d308214428---63195202706.pdf
    • http://wojno-stal.pl/pliki/file/28341410216.pdf
    • https://dienlanhhonganh.com/images/pic/file/miromimekaguwata.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/d9fbd9b873124aa834f49119f8d47e79/33123522964.pdf
    • https://louvre.lv/res/wysiwyg/file/93323192253.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16077571ce3524---67123158397.pdf
    • http://hilltop1976.com/clients/24685/File/8878807618.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/8fef8a726cf5cd2fe6c0494567d84c37/72867917278.pdf
    • http://tajeer.co/userfiles/file/banesafelixu.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/de4a45e59c45c02d6fe52e2537621bee/62053349145.pdf
    • http://asude.istanbul/ck_images/files/93689359934.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081fefa4ed7a---5394808874.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5912a434629fc2f3ef4a764405d79db1/vibuzijenovidewevisodun.pdf
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/vekofajadujokaw.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=are+platypus+the+only+mammals+that+lay+eggs
    • 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_off0001060a.bin
9d5c29bb9816eb1dcdf293dcdb837ac27155398b271eadd4f806e435e3c7556b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1060A 17844 bytes
font_01_sfnt_off00013440.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13440 16792 bytes
font_02_sfnt_off00014c57.bin
edec1cf3c71ae4746a365b7dedac1f7b98782516403d524cfde7ecdb80c438eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C57 10800 bytes