Malicious PDF — malware analysis report

Static analysis result for SHA-256 415797d97a84c9d8…

MALICIOUS

PDF

97.7 KB Created: 2021-07-04 01:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d0706bb25fa7d36e0a8bfe33546ff975 SHA-1: 4d95c83de9dc5f079ce738957b3ee6d330144ad5 SHA-256: 415797d97a84c9d8f63a552368e46f4b197ce8eef489f8991704547726cd7852
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and links to compromised WordPress uploads, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or SEO manipulation. No scripts were extracted, but the presence of many external links points to a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9681

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://queure.ru/uplcv?utm_term=brown+and+copper+ombre PDF link annotation
    • https://goodline.by/userfiles/file/47369344312.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/m183jhes2c02clp747ure7ftp0/wokobofux.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/p85c4k7qafn4oqj9olg8phqk4v/79813254782.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c31875a70---zorezakazijiwome.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bdce654d88e---99046644930.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1739d957c---48419170575.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/9d8617572c3cbf8fabc5d251d0721673/41333756050.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b240ec9a1b0---xofamufapamo.pdfIn PDF document text
    • https://windsbs.biz/files/file/luninadotosezibajag.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160706f933df70---zeradisuviretibu.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/98143951285.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/52536462427.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160775e987a397---8507868918.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bce02188080---guririporexoretujas.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb0effb1ef3---miwuwu.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/3f229a04a320e092f7706e6a9ad7d503/vonoxow.pdfIn PDF document text
    • http://pk.mo/userfiles/file/54911470564.pdfIn PDF document text
    • https://puppometalli.eu/file/fejonoxilutesulex.pdfIn PDF document text
    • http://abnicum.com/files/file/surefunirirejim.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb367d619d---31976916749.pdfIn PDF document text
    • http://myqself.com/upload/files/lediwafujexalas.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098364a490ee---35491229888.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/95439030510.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbffda1dec9---48683726483.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723941243e1---65422447303.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cec40ea5227---98586341429.pdfIn PDF document text
    • https://fobh.net/userfiles/files/42556398244.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00010156.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10156 18692 bytes
SHA-256: 26e7178f6fb756d8d4fd64b43ca9e9ee7e380e740c06b18089f3b9f810a0f761
font_01_sfnt_off00011f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F27 16156 bytes
SHA-256: f10cf000a12801c6a9a47c9c4432800bc192d85036fa632ba327e4bdd6919111
font_02_sfnt_off000148e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000160fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160FC 10552 bytes
SHA-256: 578880579b8131049e38cf120dca5370ad028d3f06bcc4e06acaba5f2f40f12e

Open this report in the interactive analyzer, or submit your own file for analysis.