Malicious PDF — malware analysis report

Static analysis result for SHA-256 32634118b60b2af4…

MALICIOUS

PDF

68.3 KB Created: 2021-09-12 05:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 023e94f116d993796aa67160d2fa4334 SHA-1: 4a50c69d9cba698c014a6ffe0d2b34c57c412651 SHA-256: 32634118b60b2af4ad52400d491adb37b4a26e42f6bda31ff10341b1a5c25bb2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for exploiting PDF viewers and delivering malicious content. The PDF also contains numerous external URIs, many of which are hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • 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 http://www.ez4parcel.net/upfile/files/2021/09/07/95340163541.pdf In PDF document text
    • http://mt-filtration.com/uploaded/file/150800910761356c742754a.pdfIn PDF document text
    • http://conelser.hu/fck_uploads/file/34538400055.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210912031018_1911252506.pdfIn PDF document text
    • http://canvangdientu.com/images/file/68726865055.pdfIn PDF document text
    • http://ibookingkr.com/FileData/ckfinder/files/20210906_41ACDCD80210550E.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/gezonixusej.pdfIn PDF document text
    • http://33podarka.ru/pictures/files/milirebiluxilego.pdfIn PDF document text
    • https://enerjimakine.com/tsrm1/img/userfiles/file/pasedobanox.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/zajomafarelemibuxemuvov.pdfIn PDF document text
    • http://phone-server.com/userfiles/file/xosepiniwazifobitamorema.pdfIn PDF document text
    • http://laptopcuhaiphong.vn/upload/files/sewasaroroguxoxomezofimes.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/74393543405.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/lesasudajekugeroju.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/66200044805.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/vokesuba.pdfIn PDF document text
    • http://videocycling.info/files/file/zininojefazutoge.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/lopowonegujizujetukesaw.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/vaveguwerisudon.pdfIn PDF document text
    • http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4491199026.pdfIn PDF document text
    • http://westhollywood.ilovepokebar.com/uploads/files/92338518281.pdfIn PDF document text
    • http://isleford.com/filespath/files/20210905090103.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=marie+de+medici+family+treePDF 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

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_off0000ae37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE37 15384 bytes
SHA-256: b37440daa9027e2ece65cbc814a752833aae3400eb23ba29cb1204d0ad2b79d7
font_01_sfnt_off0000d4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ecb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB8 10352 bytes
SHA-256: 212857221790aab3c2ee5b0acfda9089eaa079e92148689bdb2f3da05a0c03d9

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