Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e26e89bebdf5153…

MALICIOUS

PDF

87.1 KB Created: 2021-09-14 02:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 051a3f1c9bace5f5bae6592e8a90aadf SHA-1: 314e2bc9fac6bab9c57f843935146ae508539dd4 SHA-256: 8e26e89bebdf5153b917982974b6e099395839b8dbdede745a1613121b91631f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ML classifiers and ClamAV. It contains numerous embedded URLs pointing to various domains, many of which appear to be part of a link farm designed to obscure the ultimate destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a phishing or malware distribution scheme, likely using popular search terms like 'download garena free fire booyah day mod apk' to attract victims. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

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://landonintergroup.com/ckfinder/userfiles/files/61188775058.pdf In PDF document text
    • http://customize.fr/fckeditor/editor/filemanager/connectors/php/img/Editor/file/47055843125.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/dotivowixeme.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/nipogagamexosipumuvixez.pdfIn PDF document text
    • https://apatity.verlauf-ekb.ru/admin/ckfinder/userfiles/files/rafisodem.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/55221616342.pdfIn PDF document text
    • http://arenabilardo.com/data/_files/tinededonewo.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/domisasepanevasomidege.pdfIn PDF document text
    • http://songdolandmarkcity.com/userfiles/file/kopaxixijopiti.pdfIn PDF document text
    • http://daiichihousing.net/uploads/news_file/71923551199.pdfIn PDF document text
    • https://afgventuregroup.com/cfiles/file/gozaxutorixasijupojox.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/kodorapikox.pdfIn PDF document text
    • https://quangcaowebsite.xemlaco.com/uploads/files/10388338948.pdfIn PDF document text
    • https://k31szmq42-nu28.com/contents/files/53738782656.pdfIn PDF document text
    • https://habibitoursegypt.com/ckfinder/userfiles/files/felop.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/11923419517.pdfIn PDF document text
    • http://xn--b1adbbbaeqjtsflbfms0e.xn--p1ai/pict/file/zixubewode.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/37291178948.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/71552961315.pdfIn PDF document text
    • http://land89.com/ckupload/files/dalalowewigil.pdfIn PDF document text
    • http://jca-t.com/fck_image/file/55242489489.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/57679620196.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/63387450399.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=download+garena+free+fire+booyah+day+mod+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2DE 16152 bytes
SHA-256: 0f62411f33c11177563efe33ebd0105f37df2a55e6a92cd5aec3f2cc21bf3838
font_01_sfnt_off0000d86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86D 22616 bytes
SHA-256: 563fd23bab7c4624c41bda66cb630be461aa6a6e6e9268238f2d9b81a4b10f96
font_02_sfnt_off000111ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111AC 1820 bytes
SHA-256: ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c
font_03_sfnt_off00011a37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A37 11112 bytes
SHA-256: 5c6d07a33bfa0b1db5d56c0b91d4b1c0ecc02354d9adb48cfe92949c9ae9673f
font_04_sfnt_off00013385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13385 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1