Malicious PDF — malware analysis report

Static analysis result for SHA-256 07aeb1a006183600…

MALICIOUS

PDF

74.0 KB Created: 2021-03-03 20:47:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce64bb2808e97f3e81ab2a6e0d51f3cb SHA-1: 0825adf757afe83716e16ca3999907b9b5b38bc1 SHA-256: 07aeb1a0061836005ed470ebc55b29365030f05f583b46a43974bdd0fac678e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, suggesting it functions as a link farm to distribute malicious content or phish users. The PDF_SEO_LINK_FARM heuristic specifically points to this behavior, with one of the external links being http://bitenozof.atwebpages.com/descargar_libro_para_aprender_ingles_gratis.pdf. No scripts were extracted, but the presence of numerous external links is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/123?utm_term=poulan+p3314+chainsaw+factory+carb+settings
    • http://pidawudimo.scienceontheweb.net/una_pulgada_cuadrada_a_centimetros_cuadrados.pdf
    • https://lanulizuxuja.weebly.com/uploads/1/3/4/6/134658029/xulateluwoxutul_wewowil_netagafofabo.pdf
    • http://dosijefa.mypressonline.com/how_to_use_a_greenlee_digital_multimeter.pdf
    • https://zukaxopukij.weebly.com/uploads/1/3/1/1/131164552/lesedetosixelafela.pdf
    • http://liwurivosopap.medianewsonline.com/93772082604.pdf
    • http://wazepewazivulil.mywebcommunity.org/toshiba_vcr_dvd_recorder_remote.pdf
    • http://sawemawe.mywebcommunity.org/52527044903.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bitenozof.atwebpages.com/descargar_libro_para_aprender_ingles_gratis.pdf
    • http://xuvekixofeku.onlinewebshop.net/20518585349.pdf
    • http://fapafefimu.rf.gd/english_funny_stories_free.pdf
    • https://s3.amazonaws.com/xufaxoferugod/what_did_the_third_estate_demand.pdf
    • https://s3.amazonaws.com/falufusu/govuda.pdf
    • https://s3.amazonaws.com/joterige/hd_wallpaper_1080p_1920x1080_for_pc.pdf
    • http://dapizodipe.myartsonline.com/how_to_set_up_a_hotspot_on_my_iphone_6.pdf
    • https://s3.amazonaws.com/jigezilor/kumon_algebra_workbook.pdf
    • https://s3.amazonaws.com/tumasun/bosch_nexxt_500_series_dryer_not_drying.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_off0000e2c7.bin
1ee78467a18f7e02b9394e0d543ff4d53faaf7753798bcfcb85b511f883d8a60		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C7 5916 bytes
font_01_sfnt_off0000f70e.bin
2699d48cd2f78cd5594e491ff0d571064b9b4c375951f6d11e509040e86bb3af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF70E 10516 bytes

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