Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0db4b7781d38ec…

MALICIOUS

PDF

74.6 KB Created: 2021-09-14 09:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2807c02acab165e7aa0709ea710f2ae1 SHA-1: e41d752545961cdc6189973dbeaac91e5678da7d SHA-256: 0d0db4b7781d38ec4f0bb025505c09c089a1a67033dfe03937a31284c3f9b284
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. The document contains numerous embedded URLs, many pointing to disposable domains, which is characteristic of a link farm designed to redirect users to malicious content. The presence of these URLs suggests an attempt to trick users into downloading further malware or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://thaiboxes.com/piceditor/file/18540137373.pdf In PDF document text
    • https://rajaunited.com/contents/files/wunotizavuxofawoge.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/20141071295.pdfIn PDF document text
    • http://www.badischer-kunstverein.de/ckfinder/userfiles/files/76602451226.pdfIn PDF document text
    • https://guruamardaspublicschool.com/userfiles/files/22635806900.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/38474870273.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1612f14750b285---49030676514.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/68173971803.pdfIn PDF document text
    • http://allineers.morefriendship.com/upload/files/15457048558.pdfIn PDF document text
    • http://sissonne.hu/editor_up/zegonagabovedokasapa.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/zedugo.pdfIn PDF document text
    • http://bbhshipyard.com/userfiles/file/sekuburelemofu.pdfIn PDF document text
    • http://austria-ex.com/images/blog/file/mimazojezafonubasiwebulo.pdfIn PDF document text
    • http://sushibelovo.ru/files/zofumetusenamibawedigad.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132fef8d1ad0---28762466743.pdfIn PDF document text
    • http://tecnoservizi.com/userfiles/files/93146437284.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/gevaxuvepe.pdfIn PDF document text
    • http://xn--or3bo5mvlb.com/data/editor/file/33592334842.pdfIn PDF document text
    • https://stephankeppel.com/userfiles/file/kulirokigazetasiput.pdfIn PDF document text
    • http://luligang.com/ckfinder/userfiles/files/xizokufejawotipanewosulo.pdfIn PDF document text
    • http://matkinhantai.com/luutru/files/34080428376.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/3507426163.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=telecharger+cpu+z+apkPDF 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_off0000c2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC1 10288 bytes
SHA-256: 9c41325965e27e8f73b6d21324aed559f038cc7ea86dfa444dcfe6fcb5a45bfd
font_02_sfnt_off0000f218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF218 16568 bytes
SHA-256: 0afba1bd5b6a91384bd9482eca344d6d1836d87c55c8781ba74a8b8d72075a47

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