Malicious PDF — malware analysis report

Static analysis result for SHA-256 07dd58ce2ed05285…

MALICIOUS

PDF

89.6 KB Created: 2021-06-28 03:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 55134d8277de17a438885e16ecb8d430 SHA-1: 16249dc98a3bb5a2f43f02f3723a5aa9dbe8bb4c SHA-256: 07dd58ce2ed05285837951f1255bb9a35e6280774f1a393bd73ac7a7e5405764
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous URLs suggests an attempt to redirect the user to malicious content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • 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://sshs61.com/clients/6/60/60e739d5a8cf4a6710e4f064fd99417d/File/sowusuluneriferome.pdf
    • http://ansonseatery.com/uploads/files/49481890423.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a78af456857---pademikawusodivigijulepip.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/d4303165ba580c198e9551292d4c4f80/gewironode.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/c52f22dc3ce1b150058881dfe2337e7d/dopusoxarozuzulereru.pdf
    • http://lamelove-zakryti.cz/userfiles/file/rabuz.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/rtokr3o668b6ng5ifsnkkkor82/77173361278.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d05aa5041---67520728766.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad453cb6e4---33486415082.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/c63f8764be67e21b14cd3c911688fce0/sukifefe.pdf
    • http://orosweb.hu/ckfinder/userfiles/files/zivosulujidasa.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cc0fe8fd0---divujowuvoratuverike.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f226ad209e---gewesujotubenu.pdf
    • http://nicolalazzarotto.com/userfiles/files/jowuduzexake.pdf
    • http://elturo.ru/img/upload/files/9165969762.pdf
    • http://movementlab.dk/userfiles/file/3383290495.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cba7c2b0c---98712657780.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9e62e385b---nelavowetigo.pdf
    • http://ipmarketing.net/userfiles/file/madaloxinevulixus.pdf
    • http://phannhan.vn/files/usersfiles/files/bilolenarelidojagofajozov.pdf
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/20754381507.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/35d460eef6d2a0d25771685d2d739739/lojefagimimamalazuves.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e868b5c87---39555802302.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/8pvu02i4lh8q4oiufnjc7drh3a/xivaxewovawoxafomipanij.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=unix+concepts+and+applications+by+sumitabha+das+pdf+free
    • 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_off0000f5fc.bin
47395633b7dedf897fd61bb5511be0a91b15f1dcba7fbad58fd0e1fa1e5509c7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FC 11348 bytes
font_01_sfnt_off0001104b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1104B 16792 bytes
font_02_sfnt_off0001285d.bin
78ac3bf53b7f0da773306c4bdc254228b7a95dcf5dd090a30212205b045184f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1285D 18316 bytes