Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f7f360264c629b…

MALICIOUS

PDF

80.5 KB Created: 2021-09-10 02:58:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 63ee68fb2c96064d8f2ef95c074de49b SHA-1: 4c66c93abfc605001c86aeb9d0a3d86770e61667 SHA-256: 27f7f360264c629be79c7b828591621b5a831683f63bdedd70355d62f3b80a3c
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a link farm with numerous distinct external URLs. The presence of many unknown reputation URLs suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • 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.
  • 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://ccswcd.com/userfiles/file/91555752812.pdf In PDF document text
    • http://lukasikgroup.pl/Image/files/69932646171.pdfIn PDF document text
    • http://tvsatkrosno.pl/userfiles/file/lugupurusapaloz.pdfIn PDF document text
    • https://tiemhoamo.com/data/dulieu/files/natavobudarigub.pdfIn PDF document text
    • https://textmakareknutsson.se/upload/image/76099264188.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/puzofogusulipujodop.pdfIn PDF document text
    • http://artwatch.ru/userfiles/file/54495527611.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130f30563428---gufafetadubata.pdfIn PDF document text
    • http://101balkon.ru/upload/files/81587871028.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/23166365175.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/53828726303.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/88190679052.pdfIn PDF document text
    • http://kerrya.com/ckfinder/userfiles/files/kugezajurovawalizosidet.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/noxug.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/23363674424.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/9296291107.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/92554468194.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/24944646851.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/wubugolozopopo.pdfIn PDF document text
    • http://apsons.eu/files/file/lezuluz.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec01099211---rojonigeworofov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=moto+g5+plus+romPDF link annotation
    • http://louisiana-arts.org.s150269.gridserver.com/siteuploads/editorimg/file/lipamipimisolizovez.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_off0000d610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD610 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE22 17920 bytes
SHA-256: b87ab5e87112c29b9dd3ec754e064710a9bf5c5c15e8c92047473185ca20025f
font_02_sfnt_off00011ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE6 10332 bytes
SHA-256: 421c73c9e559618ccd84e01e115919819cbd5b6c20ac7934a0d9a5a379e1013a

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