Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba3d5352315d4bf3…

MALICIOUS

PDF

84.8 KB Created: 2021-09-09 14:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e3542943c44f5833d28f0b41957f99d3 SHA-1: 679379edd06b5303af1528912d5f3aeb913bc4a0 SHA-256: ba3d5352315d4bf3147485fefe719205a1b6349de1e7381986e003b4768238c5
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URIs, including one pointing to a raw IP address, which is a strong indicator of malicious intent. The ML classifier and ClamAV detection further support this assessment. The presence of links disguised with popular media terms suggests a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.abrasco.org.br/ckfinder/userfiles/files/zexugogiwulelamowinawaw.pdf In PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7e2aaf38e---midominezobuv.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/tomolujo.pdfIn PDF document text
    • http://kanalizace-ul.cz/userfiles/file/58045649183.pdfIn PDF document text
    • http://www.golfusa.be/userfiles/files/51518632526.pdfIn PDF document text
    • https://upbilbao.com/ckfinder/userfiles/files/bimerudoxifesusopolemonuj.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/76a2ecf8df8a6aec76b11298bfb095dd/kukanebofotan.pdfIn PDF document text
    • http://tataservice.it/userfiles/file/86987089492.pdfIn PDF document text
    • http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/donutonokobuvof.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/sepezopax.pdfIn PDF document text
    • http://chornakorn-packing.com/ckfinder/userfiles/files/barunisuro.pdfIn PDF document text
    • http://www.ocptecnology.com/admin/uploaded/fck/file/wapumef.pdfIn PDF document text
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/najuzalajenugep.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/wozapimema.pdfIn PDF document text
    • https://xn--90aoja6ahg5ds.xn--p1ai/uploads/files/5128861013.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210905_155431.pdfPDF link annotation
    • http://thietbimaugiao.vn/Images_upload/files/kanavotof.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/rebusananu.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/minuvofir.pdfIn PDF document text
    • https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/67770605150.pdfIn PDF document text
    • http://infosierra.es/images/editor/87999201231.pdfIn PDF document text
    • https://mashura.co/userfiles/files/52404637823.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=avengers+endgame+watch+movie+online+freePDF 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_off0000e314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE314 18964 bytes
SHA-256: bd2623c3714287a72cd55b711256eba590aa08c1a99b0872dcd727cd50a597c1
font_01_sfnt_off000113f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F9 11056 bytes
SHA-256: 4d67b0de70416d9bb315608becfdcf4f9bd7b6f6d19acefcf945bccbd710db00
font_02_sfnt_off00012d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1