Malicious PDF — malware analysis report

Static analysis result for SHA-256 8333876c6e94868f…

MALICIOUS

PDF

71.4 KB Created: 2021-02-12 04:45:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2875f43c61c3a7d7ad39cdfb128fdcc6 SHA-1: 3307c906b21556df2c9a30b133f954e3e12e779d SHA-256: 8333876c6e94868f8109fd817dc837d4e57440cf8fa3e3c29feea72cd7b2d5e9
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://crophysi.ru/wix?keyword=csta+2020+palm+springs In PDF document text
    • http://naturebiolog.fun/italian_music_jewelry_boxbv7pc.pdfIn PDF document text
    • http://fredo.bike/jolt_meaning_in_englishbz1i8.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/a829cc55e54d.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/e3QafvG/zombie_hive_mod_apk_3._2._5.pdfIn PDF document text
    • http://rewuvov.iblogger.org/ielts_reading_practice_2018_with_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/vopufepivipe/athdjeh/44630108897.pdfIn PDF document text
    • https://cdn.sqhk.co/nukunudakiju/cpgjQif/los_alumnos_toman_apuntes_in_english.pdfIn PDF document text
    • https://mogorabijeruli.weebly.com/uploads/1/3/1/3/131380728/lopuw.pdfIn PDF document text
    • https://wemawamirake.weebly.com/uploads/1/3/5/9/135959397/416fbbc48.pdfIn PDF document text
    • http://dk-inc.xyz/inside_out_movie_summaryqsud2.pdfIn PDF document text
    • https://cdn.sqhk.co/rapavuse/OhbhhNi/football_manager_2019_squad_update_2020.pdfIn PDF document text
    • https://fwcdn.pl/fpo/95/86In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wegugus/safokipunifot.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/jolemoxezojimuxowa.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/2178247718.pdfIn PDF document text
    • http://vetozidute.rf.gd/purevpn_openvpn_server_list.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/81305334184.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/65983575989.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/3776952206.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/math_solving_worksheets.pdfIn PDF document text
    • http://xofuzugavup.epizy.com/888_casino_app_fr_android.pdfIn PDF document text
    • http://lajimaju.epizy.com/royal_canin_development_puppy_canned_feeding_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/41063940583.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/zowojufosot.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_off0000da9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9F 5320 bytes
SHA-256: 0fd2af7028aa71f377a7c0cfa147cc1a941a817003e0915e1ee1b63c0587b7c2
font_01_sfnt_off0000ec98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC98 10440 bytes
SHA-256: b43adc81ea8b229efb76dfff08ccabe31b78b436c22b074949b793a7102c3bdb

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