Malicious PDF — malware analysis report

Static analysis result for SHA-256 3587adcefb5c6274…

MALICIOUS

PDF

90.5 KB Created: 2021-07-02 09:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 9c3bf91b48f3584c147f1f70878d24d4 SHA-1: c7852d368e87e3b791ac82e7d47fd34789c2cfed SHA-256: 3587adcefb5c6274623589e85afc21f5a08e16e14359dc648aa716a8f163e91a
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/jiu577t2gcej81br2idagb74ib/likitofomirazepaz.pdf In PDF document text
    • https://aawyx.com/sites/default/imageuser/file/57366653600.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/dcca5c4745b8f62a6eb8017b4bd15741/wiwudezufid.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/de0j4bd19rn23tjm393t8l36nj/pepodamekalaro.pdfIn PDF document text
    • http://thanhtindesign.vn/uploads/image/files/15401049907.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16077be4d0fb9b---buvobepojamazezuzoset.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/ncs3hafsp0hhs8su0vj34qv7s7/35922436491.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/sigimadiwe.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16094debf4b5d4---23923126625.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/lemobunatadi.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa0e0a9827---91312748047.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/14797555378.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1606d478978a2b---91615198822.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee256e2aa5---68751349160.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b6623655be2---verexujagejiwifiwum.pdfIn PDF document text
    • http://bociany.sk/media/file/28025073432.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/nedizobitigo.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/zakipaxoniz.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80d534ee8f---tuwuzopuwalanedafomaniro.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/7924538494.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f31338043---44465662112.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/zorixuwelotezutisekosunab.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/45381132640.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=romeo+and+juliet+act+1+quiz+answersPDF 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_off0000fdd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E5 17244 bytes
SHA-256: 1638fc256e01e115e2121f9924230b5e244f10f98187b3abc8405d75e62f6666
font_02_sfnt_off00014304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14304 11148 bytes
SHA-256: 72679053efb5a72ec48c1b05d7cf40d4f1e5f04bef74412fa011bcd01d51fadd

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