Malicious PDF — malware analysis report

Static analysis result for SHA-256 f72d4c5b6eda6d08…

MALICIOUS

PDF

76.0 KB Created: 2021-03-14 01:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 11a602617ac4968ed3cb4f32f1ef62fe SHA-1: d52ba7ac14a4fb3f1091e8f259378c1638def367 SHA-256: f72d4c5b6eda6d0846da5d5264b2336b4ceefa5037c9728e4c5079266e05f74b
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/award?keyword=euphoric+recall+pdf PDF link annotation
    • http://nakidki-alkantara.xyz/how_much_does_a_new_wii_costg899v.pdfIn PDF document text
    • https://cdn.sqhk.co/zabeluzitema/fKhhggd/dashboard_switch_panel.pdfIn PDF document text
    • http://tapidiv.medianewsonline.com/dell_latitude_e7450_specs.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/jcifRNO/skulls_of_the_shogun_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/niturunajik/hgghdAf/jatifezinozijomokole.pdfIn PDF document text
    • http://banademebilite.sportsontheweb.net/24521398831.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/18360012472.pdfIn PDF document text
    • http://lukezelulevuf.22web.org/6505141043.pdfIn PDF document text
    • http://walokarora.iblogger.org/sutupofakagipadapudarejo.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwufeguv/Rhchche/new_management_books_2019_october.pdfIn PDF document text
    • http://goloszauniver.fun/how_to_change_from_celsius_to_fahrenheit_on_white_rodgers_thermostatw01sh.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/NyZhf9R/negirogozasu.pdfIn PDF document text
    • https://cdn.sqhk.co/sunalikefazo/6Pgiic5/ringtones_top_100_download.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/amazon_prime_harry_potter_book_set.pdfIn PDF document text
    • http://pejibapu.iblogger.org/balugoxuxevifilizetid.pdfIn PDF document text
    • http://vipmanmarket.space/good_saint_bernard_namest2ynm.pdfIn PDF document text
    • https://cdn.sqhk.co/bonosexov/hiijdTQ/shipwrecked_egg_harbor_fire.pdfIn PDF document text
    • http://kanshoper.site/127581262755g0v1.pdfIn PDF document text
    • http://ziratonis.iblogger.org/birthday_invitation_sample_template.pdfIn PDF document text
    • https://cdn.sqhk.co/gupuwiwi/jagjojj/40733472859.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/idItEgh/color_galaxy_live_wallpapers_3d.pdfIn PDF document text
    • http://nofomunagipu.iblogger.org/112099261.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/jfjgrjf/puffin_web_browser_apkmirror.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://risumipekalur.rf.gd/68819109810.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/sibosit.pdfIn PDF document text
    • http://zijemuviwovo.rf.gd/helmeted_chameleon_care_sheet.pdfIn PDF document text
    • http://setavafajo.epizy.com/lightning_thief_graphic_novel.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_off0000ec3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3B 5024 bytes
SHA-256: 74699a8ed3df5151988ca2c321521a657df76e489d656a9d9f71ddaf3bcf8d61
font_01_sfnt_off0000fd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4F 10848 bytes
SHA-256: c1d01132c99075096999c1024544af73e11e30dfa71cfe52c3f789e611c4da3c

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