Malicious PDF — malware analysis report

Static analysis result for SHA-256 67cffcfb9d667d13…

MALICIOUS

PDF

101.3 KB Created: 2021-09-06 23:54:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 93eab9a54a531f60920e159bfeafa4f0 SHA-1: de6013dc5eac2b6e6d8c1eb75a284606d399392f SHA-256: 67cffcfb9d667d1356e1be895dc7b0d5e486472446994316d456cdad5c8570ed
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These URLs are likely intended to lure users into clicking them, leading to phishing pages or further malware downloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://nomylo.ru/uplcv?utm_term=l%27insociable+sociabilit%C3%A9+pdf PDF link annotation
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/405565f59dd86348af8f8ef9306edaaf/tirolirukeminedodudub.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/45217597762.pdfIn PDF document text
    • http://mp-journal.com/media/file/rexudapefoxeb.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/o23llhhps3rdkoaqdqto115gk5/wufiwidube.pdfIn PDF document text
    • http://alkanboya.com/files/file///92725070355.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/bugagajarumetu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2915383c76---80214951795.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161009654afe30---vidutelujeze.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160dbc66c0cc8f---wifekegujipatu.pdfIn PDF document text
    • https://clove7.com/userfiles/file/14428716607.pdfIn PDF document text
    • https://tapuionoticias.com/ckfinder/files/55078736347.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/68917837427.pdfIn PDF document text
    • http://food-cloud.com/home/food-cloud/www/site/site/data/files/14835264764.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/pepalifatiboze.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/15605079469.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/dobefefozesewivugetugi.pdfIn PDF document text
    • https://kede.org/userfiles/file/70020990944.pdfIn PDF document text
    • http://nprofit.hk/userfiles/zogokivuvagipuzitunused.pdfIn PDF document text
    • http://hopkinshigh1988.com/clients/75739/File/42608645709.pdfIn PDF document text
    • http://talentfuturesservices.com/sharpinstitute/images/files/18312710970.pdfIn PDF document text
    • https://kristinanamaste.eu/files/linetibazalag.pdfIn PDF document text
    • http://grotech.in/userfiles/file/31717698814.pdfIn PDF document text
    • https://ciiinnovationsummit.com/ci/userfiles/files/fewujitidogake.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/fagilapal.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_off00011db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB2 21892 bytes
SHA-256: 4da6bb2c948d12317b88c745a1bce0ddf422e67df088ac011f82d91a45d8c04d
font_01_sfnt_off000154f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D08 10800 bytes
SHA-256: 6bf450320932e3c08a6cfeea786720af13abbaf6238d83ed8ba6fe20ae2c33f5

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