Malicious PDF — malware analysis report

Static analysis result for SHA-256 78970f47eadfabe6…

MALICIOUS

PDF

80.0 KB Created: 2021-08-25 07:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4d127eb63dff0a4fa465c2a0a1d31057 SHA-1: 8ed36e45ea53093787d5cb31652daa92bc6c5a65 SHA-256: 78970f47eadfabe601e1f4484e9c56fdb4f02f32c783b54e5211c55f14906e2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://tecnoservizi.com/userfiles/files/xevipikategojivudiragejax.pdf In PDF document text
    • http://innovatepc.com/userfiles/file/89721516822.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afc9dee7ce7---70779520210.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/39c875f0b68076418f9301e43b167389/lewisezetulavatepon.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/vibanugujifosem.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/72649008992.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/d38b0ce22e18b4da1cbb1be2808661dd/zaruvasuzovudux.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/45209166966.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/42397620fe7e292c2d4f6579b49b8e36/badevaxakijodirafarapas.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/sapewupozotutirabeguze.pdfIn PDF document text
    • https://paymentor.nl/uploads//file/53786128187.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/8f697645d72559472bc09fa4109dcc0a/vojukasujinewifidaj.pdfIn PDF document text
    • http://autoscuolemontagna.it/userfiles/files/fabokuxapapusuzuwutawoma.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/00e1c6329964bb9a954516b5fe528a9d/61385945088.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/zaxunijobovilen.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///robefesapawipobuzit.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/28223d87a7434f59840a40c4fc5ae1bf/lisipatawuvevizevasam.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/melod.pdfIn PDF document text
    • http://loca-granderoue-montaletang.com/ckfinder/userfiles/files/rixuvodosa.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/81864255195.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/ec1006k3i6rrohkqt3drd6t9qn/vumodozosa.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/16178111535.pdfIn PDF document text
    • https://aneri12.eu/res/file/nadelovariweketale.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=proceedings+of+the+international+academy+of+ecology+and+environmental+sciencesPDF 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_off0000d1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D9 11104 bytes
SHA-256: d368d9c2c1725016900ea9228f9853ca3cd3cbb17a0443bb3bedcbde77544e15
font_01_sfnt_off0000eb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001036f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036F 17384 bytes
SHA-256: 82d1a31b1e00e6e25f1923545d8dd29d9b554e653d193a9cf398a8f4004c13e4

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