Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03c60f2824cece1…

MALICIOUS

PDF

73.2 KB Created: 2021-09-15 12:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1b492c13e4a55de4ce7ba407d1f5d2bb SHA-1: e3ad75c180b6f294f6ccf61c0edfae75b116d49a SHA-256: e03c60f2824cece1a72996b8481ad5391302823650deb29769214e3d9a473730
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to potentially malicious content. The presence of external URIs and the overall structure strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://irlanc.ru/uplcv?utm_term=minecraft+1.17+free+download+android PDF link annotation
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c8eb9a086---tarimobupaviwegoxodapoj.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/62613630364.pdfIn PDF document text
    • http://yh-nutri.com/filespath/files/20210902012342.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16140073e6b340---91931417924.pdfIn PDF document text
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/nameguwofudugij.pdfIn PDF document text
    • http://bonaparte-kerkrade.nl/fckeditor/ckfinder/userfiles/file/nowowuwokemuzi.pdfIn PDF document text
    • http://luijkzonwering.nl/image/file/buvalad.pdfIn PDF document text
    • http://studiotecnicodama.it/userfiles/files/guvodadanugilidigosewili.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/b2ca8ce0ba451a7a939fe742db153bbf/tevexalupotor.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/lozevatalapiw.pdfIn PDF document text
    • https://www.nstoplana.rs/ckfinder/userfiles/files/wadaledirigesuwudeg.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/44101863926.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/6b3cbfc394bbceb76edec03c159ab592/74140223462.pdfIn PDF document text
    • http://khachsanmyngoc.com/upload/files/tedelina.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/matokera.pdfIn PDF document text
    • https://tsegypt.com/file/zoxujufewexojipuruw.pdfIn PDF document text
    • https://apatity.verlauf-ekb.ru/admin/ckfinder/userfiles/files/fumetotebekogebapage.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/p7qfv98cc526rbcnebcj2lf394/2189598549.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/mazematapipi.pdfIn PDF document text
    • http://ekorepetycje.eu/Upload/file/nelev.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/tunebomupixekogok.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/mejufivuk.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141114387075---paropiwibamizoperiwod.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_off0000be82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD699 10548 bytes
SHA-256: e3adbcc845aafd3b211c00256685ab26762ffe5e3742cd25698b8ca439641175
font_02_sfnt_off0000eee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE7 15732 bytes
SHA-256: cbf844bfef02ab1b3d7f63134d332fb2c853958f093f1d10b961694abe80b025

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