Malicious PDF — malware analysis report

Static analysis result for SHA-256 077f370fcf45e649…

MALICIOUS

PDF

74.3 KB Created: 2021-09-20 12:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 519d8c6c3e4dc3a18287bf88346cd2c8 SHA-1: 19e514fdffe00380801818699844005ad017cb20 SHA-256: 077f370fcf45e649af38ea27c1a8370c6e671e53cce82fbcfa0f8fc5b6120828
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://crysiq.ru/uplcv?utm_term=the+legion+2010+full+movie PDF link annotation
    • https://binarbaidtrading.com/public_html/userfiles/file/tediwumutigefefijeveras.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/mexojifirolew.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16148226e0d73a---zujago.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161346077d1b7d---gijoxikarasijijitidepozir.pdfIn PDF document text
    • http://vakaruinzinerija.lt/userfiles/file/tikal.pdfIn PDF document text
    • http://lauraestetica.com/userfiles/files/19913409949.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/tikugivozufedapubifaxil.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/65181404809.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/18917381177.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/1864992822.pdfIn PDF document text
    • https://floresdeserrezuela.com/aym_image/files/9076949181.pdfIn PDF document text
    • https://glozor.com/userfiles/file/49919157557.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/pumof.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/gtp6fgu1mmcde9b1kou4b7p6si/nigibota.pdfIn PDF document text
    • https://valstybestarnyba.com/upckfinder/files/54830527015.pdfIn PDF document text
    • https://matfplayer.com/calisma2/files/uploads/54991426861.pdfIn PDF document text
    • http://atomiccm.com/userfiles/files/kobebifezuposegaxat.pdfIn PDF document text
    • http://xn--h49al71atridzo.com/userData/board/file/42999400065.pdfIn PDF document text
    • http://ksiclub.org/projects/achievemore/admin/upload/fckImages/file/78877390313.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/lqknajp1vn9bfucddmo1jgtso5/88377080640.pdfIn PDF document text
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/47078753305.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/c92295204edf504d4079c7b4023e35fa/vivosafesutajowediziki.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/5109443253.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/44400003692.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613006cfa9679---takifegu.pdfIn PDF document text
    • 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_off0000bdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF1 17344 bytes
SHA-256: 107d4bd2e5022fea43ccbc4b7f227468ba534db7e1c437d88b73c625f9d62170
font_01_sfnt_off0000eb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3D 10556 bytes
SHA-256: 2cdd97fc7aa0704a03a86558b50559a64e553ae06bdb666458149b1050d8ef5c
font_02_sfnt_off0001032e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1