Malicious PDF — malware analysis report

Static analysis result for SHA-256 37d83fc8b6b81d17…

MALICIOUS

PDF

75.9 KB Created: 2021-03-29 19:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 201756ed3498e02c9776a4d9d7a51fde SHA-1: 83925b8c241f22b30988a24bf078dbd9c1761c65 SHA-256: 37d83fc8b6b81d176820da6bed6439e20d7dcedfa256e75e5f15b293bb21957e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body and embedded URLs suggest a phishing lure related to 'backpage alternative websites uk', directing users to potentially malicious sites. No scripts were extracted, but the presence of multiple suspicious URLs points towards a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/wix?keyword=backpage+alternative+websites+uk
    • https://cdn.sqhk.co/duxadikoti/tslhaYP/tafheem_ul_quran_malayalam_for_pc.pdf
    • http://rezexepenoma.scienceontheweb.net/46473810053.pdf
    • http://copyright-notice-ig.com/692920710592llus.pdf
    • http://fallofelin.online/brother_printer_mfc_7360n_no_paper_error76cdp.pdf
    • https://cdn.sqhk.co/kujusiru/ec4pmjb/ribomisezevimanenom.pdf
    • https://cdn.sqhk.co/luvafuza/LPifmii/48725431131.pdf
    • https://cdn.sqhk.co/tirabipati/fiiA1jh/tojixamoxiwepajusufowato.pdf
    • https://cdn.sqhk.co/fonazovep/Thfjhji/44819695952.pdf
    • http://tufuwavaziga.mygamesonline.org/wonderful_christmas_time_sheet_music.pdf
    • https://cdn.sqhk.co/libuzewis/CFghigd/pulsera_smart_bracelet.pdf
    • http://futajef.medianewsonline.com/70390530522.pdf
    • https://cdn.sqhk.co/gizoxemovefi/6ggcBia/16563068066.pdf
    • https://static.s123-cdn-static.com/uploads/4416934/normal_5fcd5449ba8d8.pdf
    • https://cdn.sqhk.co/tuxarulenogu/ghxidia/mp4_video_player_windows_7_32_bit.pdf
    • http://easycreditscore.info/646416624840ka1a.pdf
    • https://cdn.sqhk.co/xinulezebi/7hfijQu/minecraft_update_caves_and_cliffs_release_date.pdf
    • https://cdn.sqhk.co/jivonaxadu/SzoYEjg/slingo_adventure_coins.pdf
    • https://cdn-cms.f-static.net/uploads/4488141/normal_603a9667a9d56.pdf
    • http://zoompol.xyz/17508875182ri3b1.pdf
    • https://cdn.sqhk.co/mopewedote/aiahd0x/xideki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vekabun.myartsonline.com/sisozomamusovimomano.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea48.bin
52ccb0035082f21429a57dc07bb4fc173ad170a4d332fadd68d7ff82aadf144f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA48 5504 bytes
font_01_sfnt_off0000fd29.bin
4c24bc9ba5d4d6f1289c28d499e3698183a9b3d72fb9300b18cdd9519fad0fb7
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD29 10844 bytes