Malicious PDF — malware analysis report

Static analysis result for SHA-256 365bb737c40620db…

MALICIOUS

PDF

79.6 KB Created: 2021-06-27 06:38:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7077eff028c7f5f9767d4b66b1ddea1d SHA-1: 6e2c8fd9fc745876adfdc3771d6e3198267653d3 SHA-256: 365bb737c40620db414818a1b5792faa328c22ed194e18ea14d93147138f6184
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous external links, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the presence of external links and the overall structure suggest it's a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://krisoc.ru/uplcv?utm_term=theraja+electrical+machines PDF link annotation
    • https://sunrise-photon.com/upfiles/editor/files/70934876234.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/37912684657.pdfIn PDF document text
    • http://steps4cancer.org/clients/a/a7/a78c374070a178914b502abaf3db82b8/File/kirisekapododegotukaxiwe.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/b7372ac09451145abc200ee19692c8f6/lonalabeterebumos.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160817bc2a638f---gawosilisefalekugan.pdfIn PDF document text
    • https://bakwanudang.com/contents//files/paxenikoludomemube.pdfIn PDF document text
    • http://bienbao.org/uploads/files/51093544625.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/mexoxu.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf9248acbf---27157408597.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098386289b0a---13870401780.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1608719a02304e---gakenobig.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945b17802a3---26539713828.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/6414898dd98a018d38ff6bd6fe243ab4/tololinibirew.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607cab2f98ec6---77448029756.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/kobagi.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6a24225b1---13513727019.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160993f3cbe14a---60483374420.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/mukud.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/70608805548.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/4446f232f014bc08ab9c85661de94bdb/4138092175.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f15e8ef8f---gotedeviveja.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a985fa14dd0---riwaga.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/712f77562f1d26f6763f56da8fcb1eea/bixanopafozibiwowiv.pdfIn PDF document text
    • http://biosite.ru/images/news/file/dupomo.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/93699219912.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/9f613a5e08563818832cd2710b4defe4/96671331096.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

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_off0000d363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD363 17576 bytes
SHA-256: 78afc5868937e3eb8bfc81545a63f0438d3e0429a2ef162a830960324e1dd253
font_01_sfnt_off000101af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C6 10468 bytes
SHA-256: 304a28f279b884a94b0be5b2443810b1c6a5259db1b04d41f116f39e03e0f25b

Open this report in the interactive analyzer, or submit your own file for analysis.