Malicious PDF — malware analysis report

Static analysis result for SHA-256 73f0d8a089a3c30b…

MALICIOUS

PDF

82.5 KB Created: 2021-09-05 18:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b5a745b9f20c5175d8ac0d39b3fd994e SHA-1: 7f8830271ecb6f2354b8ab4c7469f0c5aee23b31 SHA-256: 73f0d8a089a3c30b6ec2524f01e95c7aff3c06155621671fd27333413401615c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The embedded JavaScript stream further indicates malicious intent, likely to facilitate the download or execution of a secondary payload. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=candela+gentlemax+pro+operator+manual PDF link annotation
    • http://euro-ex.com/2857670805.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/tizerimekuritatodu.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/1lj8eq929o8uer1viarh2fb4d3/90174443068.pdfIn PDF document text
    • http://www.ortodonciaelisafarache.com/ckfinder/userfiles/files/namojef.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/depesenovo.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/24533642488.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/25064553852.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/novobir.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd263cf2f6---siwifaxogofeli.pdfIn PDF document text
    • http://capthepcongtrinh.com/uploads/news/files/53390160448.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e590efbb3---gakeginosuvufawosatuli.pdfIn PDF document text
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/40127196685.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16077266d32791---89054052684.pdfIn PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/woxukuberenapaginitedav.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/nedejubekixo.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/q6h30h5tn2ott7e6oh0vjpiaj4/kegusumaguluxexixokiri.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/20218281337425097.pdfIn PDF document text
    • http://manvilastrust-org.bvirani.com/ckfinder/userfiles/files/tuvidavawinu.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbbbb8ffac---10448986113.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/69bcaad872f383cb822585a6150c9909/letigowoxopexiguxefi.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/88962096215.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/serofizuxuxuzepusenofupaj.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_off0000da00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF217 10708 bytes
SHA-256: 015f2e1dd3051d24fd068aa415cea4f1a57ab54025f1233b39173d3a479be938
font_02_sfnt_off00010a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A73 19156 bytes
SHA-256: fed22677694daf2fd5731b22033a84911c02e67112f651276cd9c4477a15b3ad

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