PDF malware analysis — malicious · 62681406b9880fda

MALICIOUS

PDF

86.8 KB Created: 2021-09-07 20:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29

MD5: e3062c89ff221f2b800e8b2867b2bf23 SHA-1: 8dfe95b226989268c8d2b5f0934f32268e2e77d9 SHA-256: 62681406b9880fdaade0fe1f8b2ae82668792b4604a60ef1504ba885ff6ee82d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 links to external websites, many hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate a likely intent to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://oniceh.ru/uplcv?utm_term=occupational+safety+and+health+pdf PDF link annotation
- http://zhengfutz.com/v15/Upload/file/202165100124844.pdfIn PDF document text
- http://pspectr.ru/userfiles/file/69125021932.pdfIn PDF document text
- https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/6883330068367935742caf51d331f227/kunox.pdfIn PDF document text
- https://jnvhardoi.org/ckfinder/userfiles/files/koxenunaz.pdfIn PDF document text
- http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160f0869d9a728---xowakewoxesiwepo.pdfIn PDF document text
- http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1610e727d66327---dubizulobuzitumidemuzevaz.pdfIn PDF document text
- http://laulumaja.fi/ckfinder/userfiles/files/20654148847.pdfIn PDF document text
- https://groupunsur4.com/contents//files/girojigaxibutavupenobeg.pdfIn PDF document text
- https://sealskinz.ru/files/file/duxekubedabavaniwanif.pdfIn PDF document text
- http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/dd6ejj57ilbvlb50sclr6kfh6u/57890387698.pdfIn PDF document text
- https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/dd842d372fbfc8077e31ac1644573efa/nikiwipur.pdfIn PDF document text
- http://reanda.com/jingkelun/userfiles/files/20210620153812.pdfIn PDF document text
- http://hvpeds.com/upload/contents/file/xuded.pdfIn PDF document text
- https://italvaping.com/file/goruju.pdfIn PDF document text
- http://zulassung4you.de/bilder/file/37406686727.pdfIn PDF document text
- https://ahreco.com/uploads/news_file/59289162773.pdfIn PDF document text
- http://labonscafe.com/userfiles/fekenuremepolevobikide.pdfIn PDF document text
- http://birkhoffhi.com/userfiles/files/giledogavaniza.pdfIn PDF document text
- http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1611daccaa2801---41516535800.pdfIn PDF document text
- https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/3f8d90f5d186ba2ece49b8caec5c3997/vufujomuga.pdfIn PDF document text
- http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/lnm60ua7j0ij72e3snj0qplnb1/kenalamukasitelizad.pdfIn PDF document text
- http://cofetariafraguta.ro/UserFiles/file/donesumut.pdfIn PDF document text
- http://55pluscommunityspecialist.com/userfiles/files/11450398593.pdfIn PDF document text
- https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/94605236037.pdfIn PDF document text
- https://srldirect.com/ckfinder/userfiles/files/leziwoxiju.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ee06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE06	17652 bytes
SHA-256: `d12c5f4ea1991d288b018ebe1d4b844d1cc0f2abe006eae9df75b95a8ac2276e`
`font_01_sfnt_off00011c0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C0D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013424.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13424	10856 bytes
SHA-256: `e9a68d4815e0b72b8b2f478507c9ac78bd044e0732c7d0c86a5c64d821df5a45`

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