Malicious PDF — malware analysis report

Static analysis result for SHA-256 44884f4bd0c58de9…

MALICIOUS

PDF

71.2 KB Created: 2021-01-22 07:01:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5ee5e94fad9fd6fcd1b5273330d3d761 SHA-1: 2b6bdc2ab1d8c53fe75a02eedf0ee1c367dbf574 SHA-256: 44884f4bd0c58de948f5c408945b1719ca2e6f91e32aa9a52b5bffcb31baa374
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or hosting malicious content. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/aws?utm_term=open+ti+bioscope+full+movie PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459035/normal_60070b74109a2.pdfIn PDF document text
    • https://site-1168215.mozfiles.com/files/1168215/semevukalopoximaxomapum.pdfIn PDF document text
    • https://worivoka.weebly.com/uploads/1/3/4/5/134588103/c7bc95f5.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/VhcVNt7/word_collect_level_259_espanol.pdfIn PDF document text
    • https://site-1177580.mozfiles.com/files/1177580/earn_mobile_recharge_online.pdfIn PDF document text
    • https://site-1250930.mozfiles.com/files/1250930/eeo_report_form_fhwa-_1391.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/SjgiiXH/best_2_player_games_on_ps4_free.pdfIn PDF document text
    • https://mofaxogarapew.weebly.com/uploads/1/3/4/7/134771612/6436413.pdfIn PDF document text
    • https://dodukitomot.weebly.com/uploads/1/3/1/4/131407143/solon_wipalel_nawufikifova.pdfIn PDF document text
    • https://cdn.sqhk.co/refevebux/hajH4KU/vukeguvegulur.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/rekawexuretowo/69962281108.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/chaos_head_english_android.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/the_princess_bride_tamil_dubbed_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/ditigarew.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/child_right_reporting_in_nigeria.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC806 5084 bytes
SHA-256: 95b49e25fbaf93ae017810ee33d7942d863eef9bec6c63cdc35cf88372922593
font_01_sfnt_off0000d948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD948 5316 bytes
SHA-256: 84ce778edf5cd2d335659354f40bdc61b26d6b842b0cac42b8ac5f6da15857b6
font_02_sfnt_off0000eaa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA2 11152 bytes
SHA-256: e8077349535b9bedcd6db2415e17972adf199c7883038ad6f10b02c5072698ba

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