Malicious PDF — malware analysis report

Static analysis result for SHA-256 081c3d191f420467…

MALICIOUS

PDF

107.8 KB Created: 2021-07-04 18:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a143747aee4c2e718aaf9aeb793c5b49 SHA-1: 6424f3fb37486a68060a055bc5c2c085c529cfea SHA-256: 081c3d191f4204679759a1b9efeaa0d46af3c150d3152180dac2f3edfb542248
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://infrive.ru/uplcv?utm_term=my+life+is+meaningless PDF link annotation
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/3nvth84t8nmc6lb2i5d95ou1r4/82302727712.pdfIn PDF document text
    • https://info-jimukyoku.jp/lot/upload/files/76603691124.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/41247442510.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/5idgtkp2i0uu0ho207vtb3b8l4/58453513962.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/xirotanijimiduj.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/9c0d836f38ea24e274567f3ab4181d02/wunogexoledid.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1dba29b27---16561073642.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/23393189872.pdfIn PDF document text
    • https://solo-enoant.com/content/files/files/36533901472.pdfIn PDF document text
    • https://cmsschoolkg.org/userfiles/file/34776757137.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/46bb7f7ee367317683fc5702d7f14a63/29268232211.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/mcsn57khh7bp0e3390pujgbb7u/63032159081.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/salupoturifabadaxoje.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/373274cbd622046b7515d6450f7fec08/banibo.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a2041b23f6d---91223781952.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/338e43908c475d0e996871d70c06ca29/vapitinilijobabilawo.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/meduta.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ca178f3c6---27322240158.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/e41ff95e1bb47f4cf217d1f400930b23/pijutiwuwila.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/35507118841.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/wetunadaketa.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/pepuxejimiwoserojoto.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/34198426514.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e50ee3d7c---dezepanumapokaw.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/34303556649.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_off0001427f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1427F 17780 bytes
SHA-256: e51ebd9c729f955fff23239a36bd8bf84de0d7ae8d456acaabf874170a855aad
font_01_sfnt_off00017108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17108 10344 bytes
SHA-256: 30bdbc926ce5b6a96174b6f6c98526a76abb1a67e8a4a53376ed5df12e7bb26e
font_02_sfnt_off0001885a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1885A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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