Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc3e5162fffd41c…

MALICIOUS

PDF

83.2 KB Created: 2021-09-17 20:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d201170bd3ec2d4f991c454c225589a6 SHA-1: 8479976880500ac530e93970b2e536c3e0150f43 SHA-256: 5cc3e5162fffd41cab27339651220daab2eb6beb0e4291db21e16889241bdfdc
166 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing lure, specifically targeting multi-factor authentication or one-time codes, as indicated by the 'SE_MFA_LURE' heuristic. It contains numerous embedded URLs, many of which point to disposable hosting, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://allytemp.ru/uplcv?utm_term=best+movie+sites+for+android PDF link annotation
    • http://trunghungplastic.com/luutru/files/jemamulenamolemedud.pdfIn PDF document text
    • http://notarius.jurist-info.ru/uploads/news/fckeditor/file/4442110825.pdfIn PDF document text
    • http://lynxauto.ru/userfiles/file/kuborilexan.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/sivenewakov.pdfIn PDF document text
    • https://turasmobilya.com/img/editor/image/file/wakasefufovunokuxivafodim.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/wivaligux.pdfIn PDF document text
    • https://www.tyrtaios.gr/ckfinder/userfiles/files/1408998602.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/tanoguwepojitazukakitow.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/kadibu.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/961706534.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/161360751346ee---63136019354.pdfIn PDF document text
    • http://wxmx.cn/upload/ckimg/files/202109021642285813.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210908_7ED5EA0C8D45A6BF.pdfIn PDF document text
    • https://innovativallatgyogyszer.hu/fileok/file/2329044302.pdfIn PDF document text
    • http://cjmfgx.morefriendship.com/upload/files/sukafofozobagife.pdfIn PDF document text
    • https://femagnet.com/upload/edu/article/file/zudunozu.pdfIn PDF document text
    • http://adhunikjewellers.com/ckfinder/userfiles/files/tepalavojolefanakogami.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/96601127629.pdfIn PDF document text
    • https://idroilektriki.gr/files/file/27016078403.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/nejenojuleteluz.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/48691902257.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/gexukedasirajufarofewavu.pdfIn PDF document text
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/levegige.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/nuxake.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/masapalewerusag.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_off0000e15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15C 10588 bytes
SHA-256: 2fbb240c965bda25a318c5edc53b2d225bae2f329ed25cb4f16b30ae6662286f
font_01_sfnt_off0000f997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF997 17664 bytes
SHA-256: dd5ef5e458ae13db0f903b7fd19d552e7f7ede51936c6744e29fb3f8411fc42c
font_02_sfnt_off000126de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1