Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c919072c7f55cb…

MALICIOUS

PDF

74.2 KB Created: 2021-04-05 19:32:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 65242c7cc3b279f94d8267da11256e48 SHA-1: 223dc9684e4594fdb4e49fb0211d680031e05d60 SHA-256: b7c919072c7f55cb8e362fa09ea8b95b14f1b44c6b53e55f267ee66869246a2f
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple high-confidence heuristics, including ClamAV and an ML classifier, indicating malicious intent. The presence of a 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristic suggests the document is designed as a phishing lure, likely to trick users into downloading further malicious content or providing sensitive information. The embedded URL points to a suspicious domain, further supporting the phishing or malware delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://midufefew.ru/123?utm_term=market+segmentation+powerpoint+template PDF link annotation
    • http://fufejezonodim.mywebcommunity.org/junaforopovojobekaxur.pdfIn PDF document text
    • http://item-get.top/what_does_a_spell_mean_in_spanishilich.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/what_order_to_read_wheel_of_time.pdfIn PDF document text
    • http://letxxnx.org/17210403696osyjk.pdfIn PDF document text
    • http://menbp.online/data_science_salary_entry-levelxxnag.pdfIn PDF document text
    • http://copyright-help-report.com/the_chrysalids_john_wyndham_reviewm87ps.pdfIn PDF document text
    • http://salestore.pro/stickman_warfare_blood_strike_apke20gu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jejulurowev/mri_thoracic_spine_report.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/personalised_number_plates_transfer_form.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/jodujolixoduwuzimasidi.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/wotusabuzimuvadoj.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/90590692501.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/xutujimufolalig.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/zomurofenolepoxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c202f076-42b4-4acf-bd09-989ddfb56bc3/49357817071.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/gabijegosepexemamifotodub.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/4214527851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9bab4fd-b0ab-44fe-bed3-919c17b38ec3/doripu.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/short_plot_summary_of_treasure_island.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/76982821263.pdfIn PDF document text
    • http://sadoboxijowem.myartsonline.com/deep_purple_child_in_time_tab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DE 5088 bytes
SHA-256: 3867091f1caaebb01b4921d4d1f4843daec51c8f8f3a993f1cddaed177b1c4a1
font_01_sfnt_off0000e729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE729 11116 bytes
SHA-256: d7c1e254e4269d9d8bb0342abfed6261f674f267f3c774936c1db532dd0b9616
font_02_sfnt_off00010cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD8 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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