Malicious PDF — malware analysis report

Static analysis result for SHA-256 4313a3f0aa2e4acc…

MALICIOUS

PDF

86.7 KB Created: 2021-07-07 00:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a645d90e1cdba88db80cbae975f40740 SHA-1: f888dd04b8cc13bfc3cee8e3cfc946cd1177e0f4 SHA-256: 4313a3f0aa2e4accd4417e77864ec986c586b3345151b4f80fb773536e452d0c
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware delivery. No scripts were extracted, but the extensive use of external links is the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/kk10q729qdj22s994m00u6j7ph/84476139270.pdf In PDF document text
    • https://thaiwoodengames.com/files/upload/files/mubijitoluzixisaz.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/e474740fff314438941783133a99ce20/zanusub.pdfIn PDF document text
    • http://ropesadventure.com/d/files/46091250215.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/94607043357.pdfIn PDF document text
    • https://hirurgija.me//files/vovetomuludibataba.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b652573270c---rulusokuvakiwupot.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/ip7bg2nm3fnatl2ua1ntgo9du1/xevililubogig.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd87c5cd158---xuwetuvoretawegageku.pdfPDF link annotation
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a706da483bf---wofakel.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/5f2525b9b221daed92349ecbf0d5f65b/90773254712.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/xigato.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/9937e22d991416e111ad1ab692f5c695/xiwameluvamigugidapa.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/6fc6382908a3dc235064db669a89a758/48039563797.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/25864658853.pdfIn PDF document text
    • http://rotarylaspalmas.orgdocumentos/file/jupadafabodalosu.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a4291f748---86528806109.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/89400730017.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c820fedebb---60888932853.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/d6efd2611be294dd1dcf9ca468d85d7c/tepemen.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/7ba62e3844a1a67269bc7bd0f10d867e/12269676416.pdfIn PDF document text
    • http://jucal.es/images/file/repafiwotumage.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c48ed0d760---51720884098.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/0e0bd4ac5639769e849834aefdd3607c/32146583002.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=top+10+comedians+in+the+worldPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4D 17396 bytes
SHA-256: 30258c92f1bd88fe032d257a8716c4ecb1bd746fa81c0bc937e2fa17710c9cd1
font_01_sfnt_off00011bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDC 11004 bytes
SHA-256: 0499e46e4570efaa18423b23345132da6e7165a957acc5d1240ba3dee0967cc1
font_02_sfnt_off00013549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13549 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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