Malicious PDF — malware analysis report

Static analysis result for SHA-256 7362607c5847085c…

MALICIOUS

PDF

72.5 KB Created: 2021-09-12 11:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6d10cdbe8847577dbafd68a7e19d2e6d SHA-1: ab46d16badb827cdb7f7d6f18d6dbbea43fcb4f8 SHA-256: 7362607c5847085cdea124f8b2e9322082f6506e9584554408178838809510cf
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. This suggests the primary purpose is to redirect users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://wakabaeducation.com/userfiles/file/89736605155.pdf In PDF document text
    • http://vector-luczak.pl/new/fck_user_files/file/78009713846.pdfIn PDF document text
    • http://www.petersonassoc.com/emailimages/file/86104966759.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/nubuj.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109071503446734.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/bafemo.pdfIn PDF document text
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/40259722532.pdfIn PDF document text
    • https://www.prieur-equipement.com/ckfinder/userfiles/files/mefuwitafafimupi.pdfIn PDF document text
    • http://metalzilemboeventi.com/userfiles/files/selinopireriganunikox.pdfIn PDF document text
    • http://1night2day.com/UserFiles/file/66395062194.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/46610891206.pdfIn PDF document text
    • http://carbonelite.ru/file/xujakasomunanusejut.pdfIn PDF document text
    • https://anhhuynoithat.com/asset/files/36983079444.pdfIn PDF document text
    • http://energywork.pl/userfiles/file/1983226948.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/73335889071.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/joleralomopowevixumexav.pdfIn PDF document text
    • https://edex.co/userfiles/files/losutafenupurokigatekapo.pdfIn PDF document text
    • http://canadianrockies.info/files/file/zudunanuxasesibebew.pdfIn PDF document text
    • http://tagsu.com/attachments/fckattachments/file/65033456347.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/46500022146.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613404dd3b9ea---xutarinokexo.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/78961532153.pdfIn PDF document text
    • https://porfic.com/fotos/file/dukutijuzowineza.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210906173131.pdfIn PDF document text
    • http://mallenmediations.com/mallenmediations/images/userfiles/file/13880104141.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=does+it+hurt+a+refrigerator+to+lay+it+on+its+sidePDF 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_off0000ba55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA55 15940 bytes
SHA-256: 9ffe3f3c963da138b5c4e7b8cc8226549eff3f1c6901844c34ac49be1b2f56bb
font_01_sfnt_off0000e30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30D 10848 bytes
SHA-256: 035adda9ae077337c5fb92ea94559c162c6584c751368a396c0a63a98d4f51f6
font_02_sfnt_off0000fbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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