Malicious PDF — malware analysis report

Static analysis result for SHA-256 da603830f502b9fb…

MALICIOUS

PDF

73.5 KB Created: 2021-02-07 10:55:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cb249d397177bbf3594c3e4eaef78db0 SHA-1: d2e9e72cae71471bf5d4eefa009c452413753a00 SHA-256: da603830f502b9fbcd752291db005ef0ebfa85ed4495dc74c66b1c134027cc06
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' indicating a large number of outbound links. The document body, though heavily obfuscated, contains text related to 'Pelham funeral home', suggesting a lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware via the linked URLs.

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 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.
  • 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://jottigo.ru/123?utm_term=pelham+funeral+home PDF link annotation
    • https://cdn.sqhk.co/xojoweva/itifgix/burger_time_game_for_sale.pdfIn PDF document text
    • https://pazunorafozide.weebly.com/uploads/1/3/0/7/130776571/gedadeb.pdfIn PDF document text
    • http://penodesige.iblogger.org/michelin_guide_vert_seoul.pdfIn PDF document text
    • http://vekirexime.22web.org/workflow_template_microsoft_word.pdfIn PDF document text
    • http://wimixolumow.iblogger.org/brown_dust_apk_english.pdfIn PDF document text
    • https://cdn.sqhk.co/xonudutixova/ggggKVH/freeciv-_server_default_port.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pepezuvizomu.rf.gd/angkor_wat_temple_map.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/nsict_berthing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/abnormal_pap_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/zedusi.pdfIn PDF document text
    • http://keputeka.epizy.com/beeruva_movie_utorrent.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/nosekalux.pdfIn PDF document text
    • http://zalezir.epizy.com/aol_mail_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/35481287462.pdfIn PDF document text
    • http://dosidojabar.epizy.com/bafg_antrag_berlin.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/jugemifosenufu.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/twitter_gif_to_phone.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61F 4832 bytes
SHA-256: 7539478e1e18e9fcc73982603ea6733a5dd539d3e54eb5fdde43daeece706805
font_01_sfnt_off0000f65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65F 10400 bytes
SHA-256: 60dbc64039c7d24c64f855c019f0594809ba2d7184ad01aea81f0f9f567a36a6

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