Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d8e0ca9ecbda28…

MALICIOUS

PDF

99.9 KB Created: 2021-07-15 13:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bc319698c03b43f4de25e574013c875b SHA-1: 118b0e919b6c0cb5e099a9ccbde0155320882028 SHA-256: 00d8e0ca9ecbda28fa0b1eb849872917381b1b2de2ae766b3567a08740452cf7
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing or malware-hosting sites. No scripts were extracted, but the structure and URL patterns are consistent with a link farm designed for phishing or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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 http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607e19eaea3c9---zavitamegutufexevuralun.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/8rr77m083nbift833jcju5hmdr/tategapi.pdf
    • http://ippon.lv/uploads/File/xasogukolebob.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c12b79a91d7---45469287473.pdf
    • https://htlexpress.com/ckfinder/userfiles/files/99367043549.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/44251254ebc6f131b80058e487b1941f/19113148060.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/d4478cdbca239f9a19ccd1c24ec3ad1e/zivisuxizobetagaduku.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/jujeledes.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b85767e7b7f---12308380886.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/4988b8576350613383b0efbe81330e65/88395881547.pdf
    • http://qca.ch/userfiles/file/madojobuzemafixezuxoda.pdf
    • http://smcertificationservices.com/userfiles/files/xikimuguninodoxajumal.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/1ce4ffe0e3b8065ab9e87b9d92ada6f5/34736988862.pdf
    • http://medicalproduct.hu/images/files/91157870609.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/8a6890e77f383ee2bc62b3201fae326f/94099350000.pdf
    • https://paklya.su/design/img/upload/file/kumexepij.pdf
    • http://pogologistics.com/ckfinder/userfiles/files/43547076563.pdf
    • http://guowangcable.com/d/files/mufijusajuwexom.pdf
    • http://humanitool.ru/userfiles/file/42780489325.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/4cqao3slus4vifanmc5p708poh/sixuxesubirukado.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/07h9vupliklueuupu3uici9lg9/76952315322.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/n0m41003bfe9vtup8k9cuiqqd4/kutoremut.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1bc8ba20e1---73770864074.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=tubidy+video+search+list
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001042b.bin
5f22f2560369bd579e93dd16054d4b727617c642909a4a1c4b4e55c9a908b501
pdf-font-stream PDF embedded font (sfnt) at offset 0x1042B 20492 bytes
font_01_sfnt_off000138ab.bin
bf8288bc261376619b9956f027bd801f8058601e3c98cc7de65fbaae7f4c4fe5
pdf-font-stream PDF embedded font (sfnt) at offset 0x138AB 10748 bytes
font_02_sfnt_off0001518f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1518F 16792 bytes
font_03_sfnt_off000169a0.bin
843b9ec18d5ea6d3e00459408ae845bedba014eca68fc0cbcb704d1f9a1ae82e
pdf-font-stream PDF embedded font (sfnt) at offset 0x169A0 16952 bytes