Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff8d1267ccdfb08…

MALICIOUS

PDF

89.5 KB Created: 2021-07-08 14:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 864607d48dcc8bfdd6fb3a6773cd63b8 SHA-1: 1d043cf5a17ddae4b4e278f39921b35da79d7dda SHA-256: 2ff8d1267ccdfb0837ec28186e0c56bad3bda5e55d50a0f970226be3f2325195
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to various domains, some of which are hosted on compromised CMS platforms or disposable hosting. These links are likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

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://svatba-emi.com/uploads/pages/files/25820059863.pdf In PDF document text
    • https://bbpartner.cz/userfiles/file/41295526797.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c025831438---zawed.pdfIn PDF document text
    • http://thevenetianmask.com/clients/71561/File/nutobozopibetev.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1d15013aa---regibitudojot.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160daefc3268a6---85242436215.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/20716548268.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/2b19bf986b9639383951e7202a2cd8d5/rarupemogipupukilemipik.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/75318320447.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff893c6206---17360583584.pdfIn PDF document text
    • http://farashimirooz.com/files/30940469745.pdfIn PDF document text
    • https://12tiga.com/contents//files/vufanezewilegamuw.pdfIn PDF document text
    • https://agatanorek.com/files/file/vogimulebis.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a51845451---tarivebofebiradel.pdfIn PDF document text
    • http://idcla.net/upload/files/3001177469.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/9diffpjpmblqentfq1ouvd6b10/wadasiwegubiwex.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/98760584907.pdfIn PDF document text
    • http://amdind.com/userfiles/file/jakigezanokeribulofopata.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/70a2cc9b632882b09e4f7d03918c9491/wazomijob.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c155c75858e---64179474824.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160917a75f0dff---runifukuxasomewepawawes.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/ecq6vfb3a910k96bp6gjbr8h82/toperusenijajunuluweve.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c74818faf0---84974755316.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/52559792551.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/6430235335.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/af962fe9c674e6d2f388dbf830368834/47176903340.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/17093958059.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bed5bfcddd3---6233522354.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=asia+physical+map+pdf+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f22f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A41 17296 bytes
SHA-256: a8e78f268fddad706577b644538bcda0b1198433a189f726ef162a3f8946446d
font_02_sfnt_off00013720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13720 1808 bytes
SHA-256: 72b66b6ac1c8391419efe08ed3db8984cb3f58026c8012adfa5df74b8e42b344
font_03_sfnt_off00013f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F83 10736 bytes
SHA-256: 02c1bc11a95dd532a54316fb92ca99b9246ebfe1eee06a0fff9d80ea2eed0142