Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06ba58ff1d45228…

MALICIOUS

PDF

72.5 KB Created: 2020-12-06 16:13:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d5a8ed819ddec303c889d5f1746c8919 SHA-1: e4213d4edb504f0bba931657b6d72144b23de2a5 SHA-256: e06ba58ff1d452285b1b1de7e4b7037752300e47cec2f29f76dc737d55a27dae
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external resources, including a known malicious redirector, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URL heuristic further supports the malicious nature of the document.

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://ggtraff.ru/aws?utm_term=big+ideas+learning+geometry+test+answers In PDF document text
    • https://xumolatakikekum.weebly.com/uploads/1/3/4/3/134335049/kutusijilegi.pdfIn PDF document text
    • https://megeleju.weebly.com/uploads/1/3/4/3/134319984/516cdcf1e8a88d.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/dudigonifu/those_who_can_teach_quote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88f9039c-3355-4236-b018-25d13cda25ed/scott_robertson_how_to_draw_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/ajax_php_mysql_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d39da331-eb3f-4bad-be53-1afd78902fb3/kenujuxoliripoladar.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/70734595963.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/truecaller_name_and_location.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/abc_phonics_apk_full.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/28187060226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23408d6f-cb56-45c6-a43c-fdded7e58553/mavaxakedafekukipojadab.pdfIn PDF document text
    • https://s3.amazonaws.com/waxejajinigafu/83226995721.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/bootstrap_form-_control_width_auto.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/atos_normativos.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/ap_stats_exam_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
    • 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_off0000c727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC727 5388 bytes
SHA-256: 60c585e985388480acc4a3fd4c1fa12b05ba62c4f2a1573d3c3c7767527863b8
font_01_sfnt_off0000d97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97A 11160 bytes
SHA-256: 1b03e6c1678c50c9c458b0feb5121921c1fa4c0f3b407c0c1966fc6c58f9497c
font_02_sfnt_off0000ffbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBB 16116 bytes
SHA-256: bfed95cd66ba6c38ce794a84c48e60236377f853ae7c46be945da4ca42c2c2c7

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