Malicious PDF — malware analysis report

Static analysis result for SHA-256 960c106d0fd29ebf…

MALICIOUS

PDF

78.3 KB Created: 2021-09-15 14:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 99db0525cba24969dd90d8f13f54a497 SHA-1: 370399c17512c03ed8ff8df87f2d4366c91de767 SHA-256: 960c106d0fd29ebf14880fcc5bcc4a4f9da7e00bdbedd57c6c3753cb985e70d2
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of brand-impersonation credential phishing. It contains embedded JavaScript and numerous external URIs, including a link farm on disposable hosting and a URL pointing to a compromised WordPress upload directory. The primary lure directs users to 'pixomot.ru', which is likely intended to harvest Facebook credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://pixomot.ru/uplcv?utm_term=ps+cc+premium+apk.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=ps+cc+premium+apk PDF link annotation
    • https://ntpuvoice.com/ckfinder/userfiles/files/4339686611.pdfIn PDF document text
    • https://florissantdesign.nl/docs/Image/file/nuziv.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/97f16db512bb372b40c73bfa91448a32/40577058267.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/10897453692.pdfIn PDF document text
    • https://plantbiochem.com/ckfinder/userfiles/files/37609650616.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613280ea7b3ff---reranekenibonef.pdfIn PDF document text
    • http://e-store-sys.com/userfiles/file/71830030507.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/wubebexisaxujebelogomawe.pdfIn PDF document text
    • http://tauroconsulting.pl/userfiles/file/votapixofotojakudevudek.pdfIn PDF document text
    • https://duragloss.pl/userfiles/file/66761387557.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/161416bf1d9fe6---lugurajuro.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/79617198865.pdfIn PDF document text
    • http://www.cpiequipos.com/assets/images/user_files/files/21688084570.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d880675b0---juzewopawavodo.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/52885227038.pdfIn PDF document text
    • http://dsraxys.com/uploads/julilunis.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/zigezubiwane.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/pumerixowuziwet.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/de93df389e1d60eba8b2ef465d94162a/pimaxudejugilidorip.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/95179089619.pdfIn PDF document text
    • http://autosvanbeek.nl/mindcms/js/ckf/userfiles/files/kumugakanomifinivisopolof.pdfIn PDF document text
    • https://coverline.ro/userfiles/file/43225448377.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/900abed2eb40bfd5715b3634801a661f/wetamodimepuxejeliraso.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613895c080024---sixulufofuwelurefat.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE697 18036 bytes
SHA-256: f6bfcb9befe97868d34944a12d05bd16dd7ceccb3e8095cacc18c91254785ef0
font_02_sfnt_off000114c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C0 10360 bytes
SHA-256: 568a83efd7a968fcbc9ca67d6a10229ab4261cad22de4a796b3aa9eecac0ef57

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