Malicious PDF — malware analysis report

Static analysis result for SHA-256 a28cb7ea8e5c4577…

MALICIOUS

PDF

70.2 KB Created: 2021-02-14 02:38:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 236bfc20fe3e79d5e6e95854909a1a37 SHA-1: f439f610a249301d29aa0f187a57ab4416fe43b8 SHA-256: a28cb7ea8e5c45777ceaf47a15e148ef56782da85353a7c974f5ba52acb6eed5
136 Risk Score

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
  • 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://seumenha.ru/aws?utm_term=cripping+the+arts+access+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409123/normal_6015ad9faeb97.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/Fghoicq/9233079318.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/56ihhfT/91787202911.pdfIn PDF document text
    • https://cdn.sqhk.co/pefatipi/MyhchfF/joxufaxojatapegogivaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/lovuzegonu/5GFOqlG/ocean_warriors_chasing_the_thunder_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/ijKhfND/bikotijevese.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/ckkia6N/through_the_ages_board_game_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/poxufape/fWheji9/globe_prepaid_wifi_promos_for_1_month.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/zuses/wekebapuvurejawejuwew.pdfIn PDF document text
    • http://javasuk.epizy.com/anisyl_formate_mw.pdfIn PDF document text
    • http://nutujetis.rf.gd/information_of_bronze_medal_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/rulozanururakiwaw.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/food_truck_cost_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/54561115069.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/boiler_operator_handbook.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_off0000d78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78D 5208 bytes
SHA-256: cec870b2cdfde61942565aaa09e6d1ca12f74bdaf04cca88ad6ff14eabb48fbd
font_01_sfnt_off0000e939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE939 10208 bytes
SHA-256: 683b014b784bea3494520ef2828fe3cbdea0fc1ba68b06f3023cc17e729639bc