Malicious PDF — malware analysis report

Static analysis result for SHA-256 75b44395b7867747…

MALICIOUS

PDF

94.4 KB Created: 2021-08-15 04:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d22c79fdd4e6d82a16a3498dae3f25a3 SHA-1: 4a349354f652a5ab4be5d19dcfe9c045adbd7b2d SHA-256: 75b44395b7867747980011b44b13015ea180d81ecf8a2a614881143125b6e711
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external URIs and links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The primary goal appears to be directing users to external resources, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://garglob.ru/uplcv?utm_term=how+to+use+white+sage+smudge+stick+for+home PDF link annotation
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160afccc3e72bf---vajisewasexuwevopebawoba.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210512115131.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/73755029780.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/96107807228.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/tmovmtq2sj9ub0o7kc4ii3jd54/59647400989.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/80875179945.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd2a54d117---maxirisobobaruvojevadu.pdfIn PDF document text
    • http://stonebreaker.at/gizujowelunarikelowima.pdfIn PDF document text
    • http://nguyenquangcomputer.com/upload/ck/files/xitopogebabud.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080df417bf2f---wivoka.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad61e8a7185---72192653370.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/36be81f49287c00325d1b20567fe6f05/zogepukazozepalutenuzokux.pdfIn PDF document text
    • https://mlbcsimleague.com/ckfinder/userfiles/files/81203657813.pdfIn PDF document text
    • https://istanajp2.com/contents//files/37861001306.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160982d736acd1---69802456803.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ec055b4e9---bidilivilimotadafixewuvaw.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607556ff4fc06---17142629830.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/54012818454.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/juzupimatofesazarefofava.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/wawovukubenof.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c02983d2306---fajodorupum.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_off00010c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C26 17452 bytes
SHA-256: 02c95a6fa47b196a4c7408ef9a90c700722f896261b9b44cabbcb524f8522693
font_01_sfnt_off000138e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E3 11040 bytes
SHA-256: 44d30010fabf454892289458ba6dd80446e249f3f73ca89b6f1a8c722fa252e2
font_02_sfnt_off0001527a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1527A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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