Malicious PDF — malware analysis report

Static analysis result for SHA-256 60dea30339f55970…

MALICIOUS

PDF

74.1 KB Created: 2021-08-01 05:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 0dfda4ea0bbba8466a947cdb086d1c30 SHA-1: a8d5bdef1ece2ac0428e91006a65c68d0d229e74 SHA-256: 60dea30339f559705ac0d6d7c4b0f374719e1cd933e0dc05f3417f92ac371727
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to obscure the final destination and evade detection. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pallenberg-busreisen.de/uploads/files/24450670025.pdf In PDF document text
    • http://penzionklara.cz/userfiles/file/deduxadeges.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/29850433222.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/8801443223.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/csdut6ja9jlept6n0vecktq4ji/87672846096.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a41add060d4---bamutelogimusal.pdfIn PDF document text
    • https://afayl.com/userfiles/file/kuvuwawejekitivireluvo.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/405d680f931573c43d244382914927bd/lofiwito.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/914j7grtd3p82q84r92np8ipud/37898529094.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086040c0ef31---68975653641.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/51913463150.pdfIn PDF document text
    • https://alutat.com/data/file/pupakonumaruwebitulive.pdfIn PDF document text
    • http://redondoclassicburger.com/uploads/files/wokem.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/61389813265.pdfIn PDF document text
    • http://hondaotohaiphong.vn/upload/files/jilititezabawiliguzoxop.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160826d27bb527---53263699863.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b4b106870fc80dcd6f9a9aa2f9d35909/vigosijesakikisa.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/bumimoseniterut.pdfIn PDF document text
    • https://reaga.net/js/ckfinder/userfiles/files/mojuzoraxetikuler.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/d91d9e99f2b9201aeef310a9d6c3b7f8/daxobaxoxukururari.pdfIn PDF document text
    • https://reparation-mobile.net/userfiles/file/98042080611.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/afac9d1a13a174201743d0126b826e5e/zetowojakupoju.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/lixufuf.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9ee37f3a9d---80569403025.pdfIn PDF document text
    • http://landonintergroup.com/ckfinder/userfiles/files/89315386258.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/1d022f336a241bfb4b56e06a95960fc5/davojawomubo.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/o74v8kq463plnjq88lj9ee4ka1/89989406130.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=download+game+ets2+mod+bus+indonesia+untuk+android+phonePDF 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_off0000be36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE36 15976 bytes
SHA-256: 8cd6130b922de363fce1503318cb6230f251bb32e4d75c682ddecfc9bdf198b0
font_01_sfnt_off0000e779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE779 11380 bytes
SHA-256: 30a493d9f131b755a0d1765905f69d50be5332ae7dc01482b6e9eccafbd3ee39
font_02_sfnt_off000101c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1