Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e42973e4e99869a…

MALICIOUS

PDF

70.8 KB Created: 2021-04-15 08:11:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2d6f043ac7a26da11b639cd37d0d26ba SHA-1: a3b88ded0bd7832c874d2536936d06d5b49d5b44 SHA-256: 8e42973e4e99869aa48ae50307642d3e49380c2a89f3321c1fb1b035f4689c81
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'dafemum.ru'. ML classification and ClamAV also flagged the file as malicious. The embedded URL is likely intended to lure the user into visiting a phishing site, which is a common tactic for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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.
  • 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://dafemum.ru/strik?utm_term=iomega+storcenter+ix2+user+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371800/normal_605f4db008962.pdfIn PDF document text
    • http://jijabewifomemab.iblogger.org/65567444775.pdfIn PDF document text
    • https://cdn.sqhk.co/gupuwiwi/4qyith0/bezozixarisaluzabolabeje.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/Wliiuhd/76704961647.pdfIn PDF document text
    • https://cdn.sqhk.co/zofukumane/Bjjhchg/country_friends_vet_clinic_in_royse_city_tx.pdfIn PDF document text
    • http://fimokeroda.22web.org/84641531612.pdfIn PDF document text
    • https://cdn.sqhk.co/lesasafo/ECBjcic/trending_hashtags_on_instagram_for_makeup_artist.pdfIn PDF document text
    • https://cdn.sqhk.co/fapolokid/elmieMW/86601671829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421213/normal_6056858095957.pdfIn PDF document text
    • http://xagabovano.22web.org/ar_rahman_surah_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/D8ifij3/27208998277.pdfIn PDF document text
    • https://cdn.sqhk.co/tikugosedik/yhbigxN/flying_hero_rescue_survival_2019_superhero_actions.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/jdiejan/59764517263.pdfIn PDF document text
    • https://cdn.sqhk.co/letojeka/ishj4m1/78131919393.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/hbOU6ge/likes_on_fb_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422631/normal_600492f3a5c0e.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/xuzed/bunker_hill_security_system_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/zirenebobulavogolazo.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/renal_tubular_acidosis_review.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/pisumuzigejaledupasiwaki.pdfIn PDF document text
    • http://mosuzuxogobet.epizy.com/8332035587.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/72957583082.pdfIn PDF document text
    • http://welididoseburiv.epizy.com/watch_avatar_2009_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/nawituzajudipofis.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/60990806278.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_off0000d683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD683 5364 bytes
SHA-256: 9704a1299da82885d16584f6ea9034a20181703671324e5965bedb1e33132162
font_01_sfnt_off0000e8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B1 10808 bytes
SHA-256: c9e681f9092f92f6ec85a7974091ed7b132c2a7043392221eaf27c4ec0486138

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