Malicious PDF — malware analysis report

Static analysis result for SHA-256 04daf0418ea7596d…

MALICIOUS

PDF

66.7 KB Created: 2021-02-24 12:51:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ee48280bc0afc8a44b7cefeda210d7dc SHA-1: 9de58bcd5c8fdb88b82303d7bfdb643ad2480086 SHA-256: 04daf0418ea7596d0dbc18c1cc814644198dfdabf0803505a22017972bc86a39
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, with one specifically identified as a redirector to malicious infrastructure. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malware through a large number of seemingly unrelated documents. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=kaba%20safe%20lock%20instructions In PDF document text
    • https://cdn.sqhk.co/jubawiwa/M0gcjhh/94238580421.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/hijiYhh/jafoxizefakiraset.pdfIn PDF document text
    • https://cdn.sqhk.co/josipinu/ihjd2ic/voltage_drop_calculation_formula_for_ht_cables.pdfIn PDF document text
    • https://kasewipiliri.weebly.com/uploads/1/3/4/9/134901701/sapasujos.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/hgdicgi/special_agent_action_movies.pdfIn PDF document text
    • https://cdn.sqhk.co/belerudoxej/tgivjjf/47379769416.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/icYuYjc/clarence_station_zig_zag_railway.pdfIn PDF document text
    • https://nufapapezo.weebly.com/uploads/1/3/0/9/130969462/jepizodigeke.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/h7F1Iig/singing_machine_classic_series_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxobenona/fmibxI2/1641758154.pdfIn PDF document text
    • http://dubulus.iblogger.org/runabovitiverasikezubel.pdfIn PDF document text
    • https://cdn.sqhk.co/wisulekekij/f6hakqq/facebook_mobile_dark_mode_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/NjhggnW/danid.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/hHEaROe/t_mobile_plans_prepaid.pdfIn PDF document text
    • https://jitebogegamoma.weebly.com/uploads/1/3/4/7/134761197/82c6d.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/tXkmijw/lokapabag.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefoveniri/Jgfgdjc/gawobebasomigi.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/veraxawewib/manual_de_gramtica_francesa_ariel_letras.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/75379423408.pdfIn PDF document text
    • http://pesogulovuxolub.rf.gd/roseville_parks_and_recreation_summer_guide_2019.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_off0000c9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D7 5048 bytes
SHA-256: c1ecc3ddf9bf5f40acba639099f326f9a196e88cd7b4096cae3fba8a168952ce
font_01_sfnt_off0000db17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB17 10356 bytes
SHA-256: 1d10e08ffe27c880d9cbe8cc3f1135b6f73fa5f8419ee0c69ab2243ec816923a

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