Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03bdd257a93983a…

MALICIOUS

PDF

77.6 KB Created: 2021-09-07 10:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 995a586c02732c17067bdd002c14afb5 SHA-1: f0351cf867e0aefd276e68634be542f0dafd3819 SHA-256: e03bdd257a93983a692f07a780ca1340594cdfb1772db0641388b230ec2c6a7c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised CMS upload directories, likely serving as a distribution point for further malware. The presence of multiple distinct hosts and the structure of the links suggest an attempt to obscure the true origin and purpose of the malicious content.

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 http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d62de363b---15751936929.pdf In PDF document text
    • https://rsebolivia.org/userfiles/file/viwuzebojumavaguvu.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/cd5b4347938dd124f2de42e29f713ed4/zavir.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4f36c9d30---zefozevumamopizofamij.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/500e08be62235045b130cd508a321789/81281982979.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/vokijidavatuguzo.pdfIn PDF document text
    • https://numberonerevolution.it/file/duxatisamerewedilolokin.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/db80c1ef02bd0d6d232bde74a29fd627/98079228161.pdfIn PDF document text
    • http://cyclad.org/UserFiles/file/bilarirafam.pdfIn PDF document text
    • http://piau-po21inn.com/CKEdit/upload/files/78626641440.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202108150453296015.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/115bfc642c5d5df4f20f013ffd57fd38/pulajulalal.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/tolulowozunifime.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607347fb5b65e---zakuzebom.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/11608175530.pdfIn PDF document text
    • http://blankheich.de/images/uploads/file/bexepavesuzo.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/be8ca13511267df1c28412fcb2bc379f/pevefozaruvavakemumikaj.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/ddbbc8b8009a27b94439bf99e5d1b769/55905460136.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1610ee815a1c73---41444796704.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/degidenuwaliletusapam.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610398612523e---94529619588.pdfIn PDF document text
    • http://vendingchat.ru/uploads/ckfinder/files/pibujadepobelefegeke.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/768a7c609866f930dfa1d279a9ecadc0/sukaremugasox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=modeling+population+growth+worksheet+answers+rabbitPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D3 17416 bytes
SHA-256: 9851cbb7057accd1f2e5ef34f0286175eebce3e6f3242494fb6c49d4d7e0397e
font_01_sfnt_off0000f6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F5 11084 bytes
SHA-256: 86e7c781ce34b2865f11ffca6ffb6ec754f44ab9a9c4da4da17507d25ca9bccb
font_02_sfnt_off0001105a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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