Malicious PDF — malware analysis report

Static analysis result for SHA-256 6276982bbb2192fa…

MALICIOUS

PDF

82.5 KB Created: 2021-09-19 17:13:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cf6c790145231118ce9750c2fbbc604b SHA-1: 12dd37522d835438f1a7da61a6a0b649c16c5ef6 SHA-256: 6276982bbb2192fa075f3eb8079d9d7f82f3990a41258233c0b1287239b5baea
166 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'SE_REMOTE_SUPPORT_LURE' suggests the document attempts to trick the user into installing remote support tools, a common tactic for phishing or malware delivery. The presence of numerous external URLs, including one pointing to 'pixomot.ru' with a 'sync outlook' term, indicates a phishing or credential harvesting attempt. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to exploit vulnerabilities or lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://pixomot.ru/uplcv?utm_term=sync+outlook+desktop+with+android PDF link annotation
    • https://tspinstruments.com/cache/fck_files/file/zagatiw.pdfIn PDF document text
    • http://hnkingdee.cn/Files/file/202195182831.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/rotuwerom.pdfIn PDF document text
    • http://kasargod.net/uploads/file/29217880707.pdfIn PDF document text
    • http://ombs.ru/uploads/files/58907266694.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/7883279565.pdfIn PDF document text
    • http://pradakshinam.com/fck_uploads/file/lufekumirosexomiruvutaga.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/kigilifogefi.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/25603474953.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///balowasapoziborone.pdfIn PDF document text
    • https://avenue102.com/uploads/file/52056210617.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021090504215027.pdfIn PDF document text
    • http://asztalosweb.hu/userfiles/file/94682600828.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/tikigaxunoniwojobolano.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/pejipoxejugibez.pdfIn PDF document text
    • https://plasy.com/uploads/file/wufirelun.pdfIn PDF document text
    • http://ekorob.pl/userfiles/file/89426899841.pdfIn PDF document text
    • http://newo.ru/files/files/bisezutedazigo.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/42555391524.pdfIn PDF document text
    • https://swaarm.de/app/webroot/upload/files/gupadivovebotoxo.pdfIn PDF document text
    • http://1-champagne.com/blog_images/blog_/file/34585883048.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613656874af18---97432603914.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202109061818083406.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/rogovagilu.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/74402314194.pdfIn PDF document text
    • https://endobible.com/userfiles/file/88622848759.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_off0000ddcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E6 11080 bytes
SHA-256: ab62889711b6c8e3a038bb57d1b6423c9b73e1f6866ee088d82594ceea549fce
font_02_sfnt_off00010fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBB 17408 bytes
SHA-256: 3a2bfd24e4946b403a572a876c48d4839866b731b7567bd822243cefa4595661