Malicious PDF — malware analysis report

Static analysis result for SHA-256 c298fc8088e38796…

MALICIOUS

PDF

80.2 KB Created: 2021-06-30 01:07:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 42d4f217eaff542a7de7de65a3af8cd8 SHA-1: 68a553b185d6daee6a9bdba6576061d546cbc49d SHA-256: c298fc8088e3879670c14844e99020adcdad3bca326967274a96851e24d02ad4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable hosting. These links likely lead to phishing pages or further malware downloads, serving as a distribution mechanism for malicious content.

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 https://drafthe.ru/uplcv?utm_term=300mm+to+cm
    • https://supermagnum-bg.com/ckfinder/userfiles/files/68851534780.pdf
    • http://shepardfarm.com/clients/877021/File/febususugegonizafi.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6deb7d44d2---nenefirufotulojuvanaseko.pdf
    • https://bjjewels.net/nbloom/fckuploads/file/16015751548.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c45bba422d1---3791971894.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cab48c8299---60383801337.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/75481780356.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/e9516b1f10d6fd5f1caff8881f1685d4/rotejigufatirexuxilebafo.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/748a76de0fc89e050e153f7e57e0c298/gatelep.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608482a6bfa05---fexol.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/d7809ca79d7ae13d8f1728badf232325/gasulakiduxuf.pdf
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/75582324638.pdf
    • http://poorclarescork.ie/images/34091957611.pdf
    • http://kamerton.nl/clientfiles/fuvuzegokavoxofapozowis.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/90f14a057c161385c5046f8b10057449/juvovatepenapa.pdf
    • https://audit-advisers.com/userfiles/file/gisabav.pdf
    • http://skiflogistics.ru/userfiles/file/tewatobe.pdf
    • https://mps-india.com/userfiles/files/rerobewopidokixoj.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd116c609b---gelogufidasujub.pdf
    • https://gaziemirkentkonseyi.com/upload/files/tepazixamix.pdf
    • http://ebslang.net/_UploadFile/Images/file/dijebe.pdf
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/94434144992.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/6d2b9cbb6de28c4046dd617487c3c827/lomimeridozekamidodewa.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/jnt42dsgeb2m6q9foh13srism5/tutobonubetapididarid.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_off0000d9e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E6 16792 bytes
font_01_sfnt_off0000f1fc.bin
c063e54b12413d07663451ca6f47bb84dd3ee1e7c8bb7fceb156fda5fb9ed195
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FC 9784 bytes
font_02_sfnt_off00010764.bin
d49d88e3711910dbf4799a1e42df0f00c32ac636b6a24ac34a406e36ab9a30b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10764 17040 bytes