Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca26947ef1623ee…

MALICIOUS

PDF

80.5 KB Created: 2021-09-03 04:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4ed965f583a34d75ada6e5a4713570ad SHA-1: 5b37cabe42fcbb6ace541666d2cd193fea691381 SHA-256: 7ca26947ef1623ee65902cd9be4ec907a9df66aeac8a358089221b1d408ead62
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, characteristic of a link farm. The primary purpose appears to be directing users to potentially malicious external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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.
  • 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://bishopsalamatkhokhar.org/userfiles/file/vaviwomalodepiwiwisamo.pdf
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/3243953505.pdf
    • https://karapinarinsaat.net/userfiles/upload/file/69123988586.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/lac7q3oepanfjtl4oc2eumf6al/dopuzo.pdf
    • https://chaletsuenodesol.de/files/56841667820.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160835e020031c---16892658992.pdf
    • http://drapikowski.pl/uploaded/fck_files/file/bojupexepelajokelikamu.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/388d9e8f651c520592c0baa3b596aa67/86689233715.pdf
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/envsf9miooq8ms58d1k8m8v0pm/samok.pdf
    • http://valkexclusief.reviews/app/webroot/files/userfiles/files/nezexivawasa.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870037e5637---wudokavidexugebid.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/pgv8i687j8s13617c7ee7e6p33/zufofetip.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16071d0a93a432---kezomufuboniruku.pdf
    • https://vinacomvietnam.vn/uploads/news_file/13644642973.pdf
    • https://ehlibeytalimleri.com/resimler/files/30882913794.pdf
    • http://prmakeup.com/Image/files/78149985152.pdf
    • http://thuduchouse.vn/pics/file/25849835740.pdf
    • http://strahyi.ru/images/file/zuxiwepojujadifoleziga.pdf
    • https://internationalmedia.com/userfiles/file/vaxazatos.pdf
    • http://anhbanglaw.com/userfiles/file/62272617041.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/655db3848fe5b30101a5fa8c4b7c7664/18005751438.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c25411ed9---13936695155.pdf
    • https://bevelec.com/bevelec/dossierMois/file/fiwafisa.pdf
    • http://www.sictombbi.fr/ckfinder/userfiles/files/kinokusi.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bc634fecac0---24874248029.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=menggabungkan+dua+pdf+jadi+satu+file
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9e5.bin
9fa7cb51f7e26e3fef1acfc1751a896961ebec42080bb30ca285412c414ea632
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E5 10908 bytes
font_01_sfnt_off0000f2d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D7 16792 bytes
font_02_sfnt_off00010ae9.bin
8e88d33d782e81d1b24bb6bbaf07972ea9676107ce1dc0d0c31055236a4d8420
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE9 16052 bytes