Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cb4b3017958be98…

MALICIOUS

PDF

85.0 KB Created: 2021-03-20 05:08:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 65239b1615a2c1afd50326b146cf90b6 SHA-1: 9db5aca20b6f76178d61440e4651fe8caca7c235 SHA-256: 6cb4b3017958be983a720e2a7c78c3404e3f9b3808fc2e76451c813f69656f33
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://seumenha.ru/award?keyword=la+biblia+perdida+igor+bergler+pdf+gratis PDF link annotation
    • http://tajizomekoza.iblogger.org/projects_using_arduino_uno_board.pdfIn PDF document text
    • https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/papamikemujekuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453754/normal_5fde5db589846.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/fNjdhbY/rokaxi.pdfIn PDF document text
    • http://xunopapazugatar.medianewsonline.com/21074982630.pdfIn PDF document text
    • http://lokunuba.iblogger.org/evod_battery_charger_walmart.pdfIn PDF document text
    • https://puxetesotomu.weebly.com/uploads/1/3/0/7/130739839/biwezato.pdfIn PDF document text
    • https://cdn.sqhk.co/zinumazak/cXmAjgE/39287654879.pdfIn PDF document text
    • https://jatisarekitikez.weebly.com/uploads/1/3/4/6/134661612/bilagavesupare-pujesi.pdfIn PDF document text
    • https://cdn.sqhk.co/dewozoju/ejiRhan/head_basketball_mod_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454306/normal_5ffdc9475bc14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451930/normal_5fe512ec71655.pdfIn PDF document text
    • https://cdn.sqhk.co/kukusagufo/ihgcZj2/66156021324.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/el_camino_de_sherlock_capitulo_2.pdfIn PDF document text
    • http://gegenig.epizy.com/metformin_weight_loss_antipsychotic_induced_weight_gain.pdfIn PDF document text
    • http://wofukisunoxo.epizy.com/steam_games_stopping.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/xawoden.pdfIn PDF document text
    • http://xologikaju.atwebpages.com/gagamuzar.pdfIn PDF document text
    • http://weponigonimogo.myartsonline.com/zanegebuv.pdfIn PDF document text
    • http://fitariruzazu.epizy.com/bangladesh_air_force_circular_2020_download.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://scripts.sil.org/OFLIn 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_off0000f549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF549 5288 bytes
SHA-256: b65d3093afb8b45a9fbd33d5ee8149d3fc68a248b5d681fc3b883c02e6f3c677
font_01_sfnt_off00010755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10755 12252 bytes
SHA-256: 4ef1cced015ed58c1f5c055111edf351aa8644c04195c41713eebc1aa37a500c
font_02_sfnt_off00012edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDC 16164 bytes
SHA-256: d781c508aaf473e50263a6aabc3f4161b7fa10724c54bb8d35addee38a7f1c44

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