Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb2c6628f39e058…

MALICIOUS

PDF

82.7 KB Created: 2021-09-14 07:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: ac5324df15c203e30a605f619dcbe338 SHA-1: b2069a483a826b388fa5425c5f65cfaa319cf9df SHA-256: 0bb2c6628f39e0585769e8612cc881975841cd224c5c4e99dbe15e319d0bb0aa
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://kqcme.yiaiwang.com.cn/upload/files/12643227267.pdf In PDF document text
    • http://kabaretyimpresariat.pl/Upload/file/segoninuvesusozefuselot.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/39142203203.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/fakimibabosomatixalabeb.pdfIn PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/32183628466.pdfIn PDF document text
    • https://guijek.com/userfiles/file/sesenepisakufazorifazixa.pdfIn PDF document text
    • http://tao-ssct.org/data/upload/file/pozopebajibebaxerur.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/vudud.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5961e0d21---vojenojogomutusuvabefa.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/bb303fa82a47afc0745399cc0484e002/16890269447.pdfIn PDF document text
    • https://www.mtiwelding.co.uk/admin/ckfinder/userfiles/files/dowonofedig.pdfIn PDF document text
    • http://rainhouse.kr/data/editor/file/4821674996132cf40e6003.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210906_8074450EC6F2AE71.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/45185916604.pdfIn PDF document text
    • http://lingvastar.z-i-g-z-a-g.com/userfiles/files/78277491319.pdfIn PDF document text
    • http://hfengly.dk/skoleportalen/userfiles/file/bipexenulofo.pdfIn PDF document text
    • http://ambulatorioveterinariomariani.it/userfiles/files/73135362899.pdfIn PDF document text
    • https://777mto.info/contents/files/22788014897.pdfIn PDF document text
    • http://gjbbang.com/userData/board/file/mukanedaxijugoxononuwup.pdfIn PDF document text
    • https://www.zochrot.org/ckfinder/userfiles/files/35558336169.pdfIn PDF document text
    • http://gandolfiarchitetti.com/userfiles/files/4842721663.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/nolifuri.pdfIn PDF document text
    • http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/30180412268.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=blacklist+contact+meaningPDF 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_off0000de7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7A 10616 bytes
SHA-256: 141c58299782d440aa29385d07ad03e9de9f49cbce952a5d315299d03555deee
font_01_sfnt_off0000f6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE0 17988 bytes
SHA-256: 04663d25564a9a4290dcae4d41048b16db086d59583a0671525f77f2791a1e0e

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