Malicious PDF — malware analysis report

Static analysis result for SHA-256 987c07d704526680…

MALICIOUS

PDF

79.2 KB Created: 2021-09-19 14:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 958450f92b1e3296b396514d65d07fe8 SHA-1: babc1af73dddea526418276bee64591fc92abf6a SHA-256: 987c07d704526680f5c429a43e8ffc22172b8029e88fdc21a6d431c958b086be
146 Risk Score

Malware Insights

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

This PDF sample was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of multiple external URIs, including one pointing to a raw IP address, suggests it is designed to redirect users to potentially harmful websites. The PDF's structure and embedded links are characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://tichdiem.surecare.vn/uploads/userfiles/file/kofojoxukamadalevelunofo.pdf In PDF document text
    • https://ceccardolj.ro/userfiles/file/69173587437.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138a23fafaf6---12361450800.pdfIn PDF document text
    • http://hbisan.com/userfiles/file/57937989541.pdfIn PDF document text
    • https://www.vasutaszeneiskola.hu/ckfinder/userfiles/files/4614128108.pdfIn PDF document text
    • http://syntrend.critical.tw/upload/files/90306818064.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/b05cab0acce048e56e5c84eec42dc788/43461310505.pdfIn PDF document text
    • http://gizmakina.com/depo/sayfaresim/file/bedaku.pdfIn PDF document text
    • https://e-motorcycle.tw/upload/emotorcycle/files/guxav.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210905065357.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/medulokugumizojim.pdfIn PDF document text
    • https://www.aaptuk.org/ckfinder/userfiles/files/71282646185.pdfIn PDF document text
    • https://mp2020.csysadmin.com/ckfinder/userfiles/files/58437528546.pdfIn PDF document text
    • http://miass.realxenon.ru/uploads/files/44530194391.pdfIn PDF document text
    • https://directorvincentchow.com/fck_filemanager_upload/file/poderibagafepa.pdfIn PDF document text
    • http://spain-ex.com/images/blog/file/29333413072.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/vunekimemi.pdfPDF link annotation
    • http://bluekeydigital.com/images/pic/file/34202862024.pdfIn PDF document text
    • http://votava2.altrodesign.eu/ckfinder/userfiles/files/52069666256.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/8228387370.pdfIn PDF document text
    • https://securitydm.com/slicice/file/59764133267.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/katogojefixagolijorigopem.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109032132156264.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/65334384043.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=android+telephone+numberPDF 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_off0000d2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB9 10548 bytes
SHA-256: a6fac34bd0742e2364fab8817203b1c4427b0d52a01e11de3add97fe0d8571ae
font_02_sfnt_off0001023b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023B 17440 bytes
SHA-256: 4f6285ada8104598c15592a8be68a51ca6ba827cea1b4fc449a87f5cb3ea11e9