Malicious PDF — malware analysis report

Static analysis result for SHA-256 60cba03d62bca21d…

MALICIOUS

PDF

80.4 KB Created: 2021-07-07 01:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 15748d35e3f19cdb79ce440b729b7d30 SHA-1: 8cf1e1c34463afe278137b663c323242a52cb728 SHA-256: 60cba03d62bca21d76f56f85f47049d5b4889e80ae55c467a1848bc00b519a5e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092fd57aa248---20883533431.pdf
    • http://westernmaki.com/uploads/files/7916422627.pdf
    • http://ztkammer.at/uploads/file/wixuzi.pdf
    • https://sluganarodu.org/userfiles/files/laxubukapova.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609637d6d06b3---71495181315.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/716qe1vie29ojeh4fr60ejqq8j/24612648979.pdf
    • http://ghioroiu.ro/sites/default/files/file/35337674305.pdf
    • http://e2ingenieros.com/ckfinder/userfiles/files/pukoliparol.pdf
    • http://nedirajtebosnu.net/userfiles/file/wezekagazifosesebi.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083621eee33c---43516931599.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a14f640b1ee---75261216801.pdf
    • http://dalaichau.com/files/wunomanaxavewuvuvamoma.pdf
    • http://logtech.cz/foto/Image/file/nakarebaweku.pdf
    • https://narimasu-chintai.net/jcfiles/file/84076183653.pdf
    • https://dnmpaint.com/sdcc/images/file/finonagu.pdf
    • http://thepokeluau.com/uploads/files/wopinufed.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/4id8u8gohruknsdnhav0bvba54/4592076723.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/527dd7c3763cf25cda7b28491ba5239e/35611547961.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070822fee8b7---14710939915.pdf
    • https://chp-travel.ir/data/file/19268669260.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb4e165d3be---91885774372.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a4ceb4034---tomiginazumixek.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27691904f6---75037261889.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=the+adam+and+eve+story+the+history+of+cataclysms+by+chan+thomas
    • https://mediaget.com/userfiles/files/zevebataxupetovuw.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_off0000cf7c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7C 16792 bytes
font_01_sfnt_off0000e793.bin
e00bfeb0fe7ba721e05ddb8c857f7dc76ce1c08f034c74a746e8352ace253a70
pdf-font-stream PDF embedded font (sfnt) at offset 0xE793 11024 bytes
font_02_sfnt_off0001010d.bin
0825592f097f657119dc8cb096c8de171cfcc7a16876a53859ed48ca5b126da3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1010D 19380 bytes