Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed0c253e2c0cea9…

MALICIOUS

PDF

91.4 KB Created: 2021-08-24 21:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 98d832fd7a319fdcd7afb28441fcab72 SHA-1: 781edb5a3624e442f8557d3ba7d3ad8494b55e79 SHA-256: 3ed0c253e2c0cea91e98fda96857ac4b1e16c13b8cb1125346a3f1ad2748c714
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability or serves as a phishing lure. The document contains a link farm directing users to multiple external URLs, some of which host other PDFs, suggesting a multi-stage attack. The presence of compromised CMS upload links further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://sanphamhanquocymy.com/uploads/files/dotababanunolivagila.pdf In PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083949cf2a20---xiruzajapokobebe.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9afaebf32e---48059697662.pdfIn PDF document text
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/vafapisinogatasafiza.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/lobirumereg.pdfIn PDF document text
    • http://weiddy.com/uploads//files/202107310048019027.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/tejutomakujakifofatirexi.pdfIn PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/foworusepapovajulote.pdfIn PDF document text
    • http://iberia-ex.com/images/blog//file/kaxukagodofokema.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c5fda3baa76---mitep.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0bc1ee3ce---86164423909.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b957ac47789---zunafivosa.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7532379c81---20529859776.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1609eebd2eaf36---sexowif.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/0piuptj0sc620emmbqia6a2vns/finegelopuloxux.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/rovamosinudobi.pdfIn PDF document text
    • http://www.polni.si/Images/files/bujatisig.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/011c56f80d10b612c5fa01aedab6b93c/65876589421.pdfIn PDF document text
    • http://yuha.be/_files/file/58964133497.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160997b6c5617c---xuniwipisibifujifolopapez.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/63360485002.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210605224728191.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=afk+arena+how+to+get+mythicPDF 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_off000100f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001190b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190B 17664 bytes
SHA-256: e1d72b206e423eead65b5a7078e2c46489d34f910d9c3e6dab87365265beee82
font_02_sfnt_off0001474d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1474D 10844 bytes
SHA-256: fad522418843b4d1dabec8b2f676f5d815dc16801112a4037b0a90727199489f

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