Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae2faad6912b5ff…

MALICIOUS

PDF

75.8 KB Created: 2021-09-18 19:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 166abed219636658ae36ddb765b6eb6c SHA-1: 7b2b0f1f5e286ca361ec7aff04b9de1e38574eb9 SHA-256: 0ae2faad6912b5ff271677214d086574e020b92cf3437b52a88866bf66d2965c
174 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains multiple external URIs and is identified as a link farm on disposable hosting. The presence of a remote-support lure suggests an attempt to trick the user into installing or running potentially malicious software. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://archism.ru/uplcv?utm_term=how+to+download+getinsta+app PDF link annotation
    • http://4998horo.gmmwireless.com/contents/files/38382787954.pdfIn PDF document text
    • http://thuocnam.xyz/images/files/36842519339.pdfIn PDF document text
    • https://perfumes.dropship-tracking.com/userfiles/files/buxevewopufewomomip.pdfIn PDF document text
    • http://viermaalh.nl/Bottesteyn/Site/afbeeldingen/file/33604113073.pdfIn PDF document text
    • https://havadisname.com/upload/ckfinder/files/samuwekuxison.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/dakibiketejobegek.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/junaguzumijonikerijir.pdfIn PDF document text
    • http://strandedtattoo.net/file/nopurefamo.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/zewamuzubaworesumew.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/82960196207.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/xexonawofavovade.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/4011404233.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/7240464293.pdfIn PDF document text
    • https://nhabe.com.vn/ckfinder/userfiles/files/26888312104.pdfIn PDF document text
    • http://olympicburger1988.com/uploads/files/ragugivusaje.pdfIn PDF document text
    • https://isosklo.cz/uploads/mapudobos.pdfIn PDF document text
    • https://aspit.ro/imagini_ws/bilalajisawavudufevurilo.pdfIn PDF document text
    • http://lohoithaiduong.com/uploads/files/19145317832.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec9159d31f---laxum.pdfIn PDF document text
    • https://limsurdua.com/contents/files/84847561531.pdfIn PDF document text
    • http://icloudcleaners.com/uploads/account/autoresponderfiles/71525470801.pdfIn PDF document text
    • http://kerekesvillszer.hu/UserFiles/file/piwukuwuxidufo.pdfIn PDF document text
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/12416715396.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/wokubezerovawi.pdfIn PDF document text
    • http://dgxzz.com/uploadfile/file/80713885151.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_off0000bfb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB5 10544 bytes
SHA-256: e053dd81fb97524127b61604c952a7536a8d81598e22600c8cff6252b9ee31e9
font_01_sfnt_off0000d7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A6 19552 bytes
SHA-256: fbda812ce58ab32bb05cbb708da5181278681af65b42b6bb05763479b0016bbc
font_02_sfnt_off0001092c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1