Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0d8bb4efa983dd…

MALICIOUS

PDF

87.3 KB Created: 2021-09-20 03:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ceee0b598b563b90fbb485295f2e239d SHA-1: f79b4f3b982a342d96d528317afe2e07c0a90ccc SHA-256: fd0d8bb4efa983dd6a9a4012d7dcd842e458a0e2c03f49dc6fef06fa2bd8942e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://allytemp.ru/uplcv?utm_term=soft+launch+ios+games PDF link annotation
    • http://soudurelauziere.com/upload/editor/file/30824871411.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/suravibimojuvi.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/97559304143.pdfIn PDF document text
    • http://saddabro.com/userfiles/file/zamefawugo.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/96415952478.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/jidafejigafawelizaporar.pdfIn PDF document text
    • http://mosme.org/uploadfile/files/86709559895.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/xokovefoxupovutosoveponuk.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/4170702987.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/lugubu.pdfIn PDF document text
    • http://hcbarrett.com/user_area/file/39924996506.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/95685282684.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/ae0131801364c94aca0a4fb0466a0259/paluraputigupape.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614579cc597b2---nadivul.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16141e2020e937---relojivusewalexi.pdfIn PDF document text
    • http://ksiclubbiz.ksiclub.org/svnprojects/DHD/Source/images/files/mabulujibo.pdfIn PDF document text
    • http://france-ex.com/images/blog/file/83044363605.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/gowilobobomuvovatijivut.pdfIn PDF document text
    • http://selidbe-beograd.info/files/xemofomusamo.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1612f51dc0ce52---sejumuturavubiwo.pdfIn PDF document text
    • https://majubesar.com/contents/files/54061045264.pdfIn PDF document text
    • http://frutapac.com/ckfinder/userfiles/files/zubufakeloxozatiminagado.pdfIn PDF document text
    • https://thietbigas.net/media/files/40840768893.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/44420942855.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/kelowofebaronamomidux.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_off0000ed8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8D 19156 bytes
SHA-256: 24592b2990d3c50eb73bfffe3513a2e610a0f6c258ef396c0fe75f7bc60605e9
font_01_sfnt_off00011e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13664 10856 bytes
SHA-256: 6498e550461ef2e131a3133c7d8b2eedd4057574f79fadce3417de0ba501c835

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