Malicious PDF — malware analysis report

Static analysis result for SHA-256 02bf27c7766b339f…

MALICIOUS

PDF

89.7 KB Created: 2021-09-01 19:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 941f1082aa2d8feec177a8f24a166fa8 SHA-1: 11cff25b3fb71abd231629d15d40f841c85d37e9 SHA-256: 02bf27c7766b339fadf0354aed0a8f9439c025ee61143918235b8b1d486b80e4
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a large number of external URIs and is identified as a link farm, with many links pointing to compromised WordPress upload storage. The document body is heavily obfuscated and unreadable, but the presence of numerous links to potentially malicious sites suggests an attempt to redirect users to phishing or malware-hosting pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=cities+skylines+linux PDF link annotation
    • https://iwistw.com/upload/files/sisevu.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a029dfd0df2---69667567602.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/77817907255.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/99v8uimak865rregp381c5cur5/45321072668.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/2ea6fe28ae78f95d044c7cc3ec4b9a9a/nozaxamuz.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/6e128b95281d050c73b379c9a5f3282b/9660808399.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/wulemeketok.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608132c7726fa---19691172875.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/rerojezetoperusiponu.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/b82pml75qmph2gfk1to5mlsr15/80862925248.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/82087983646.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/74544476482.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/38051619163.pdfIn PDF document text
    • http://awardholding.com/uploads/files/zajozizemetexedo.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/zuwolomew.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/sesuvogija.pdfIn PDF document text
    • http://thekitchendesignstudio.org/uploads/files/varijexinugafe.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/46057879837.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/56827051879.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/75881232018.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/88d3423b3f4f78c6789f2080980e7feb/gebudiro.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/tfdlv85a969jugdre2p3rr5a9o/50088027419.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/1ad852d4b0c56ff79bbae6157cc55d12/86803088811.pdfIn PDF document text
    • http://melabo.com/upload/files/42809860489.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_off0000f6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E0 10156 bytes
SHA-256: 8712aaf0832a8200e959c9596862385764cee19f3d329c049da6db0508c4036b
font_01_sfnt_off00010dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D3 19724 bytes
SHA-256: 6ca16a639f5772248abc1b285be6889db0791e00e1ba6c7f833099a4ba9055c2

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