Malicious PDF — malware analysis report

Static analysis result for SHA-256 99146e17aebc0022…

MALICIOUS

PDF

72.1 KB Created: 2021-02-23 21:18:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c3ac82e6727e1a384ab29f01b7adf5fc SHA-1: bf40fc0397d8a4fae27f273e186ad8215a6239b8 SHA-256: 99146e17aebc0022b579a9eab11466814a0cd0040c792df5cf3c61a718b7ffae
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://leonvi.ru/wb?keyword=delonghi%20portable%20air%20conditioner%20heat%20pump PDF link annotation
    • https://pizipeko.weebly.com/uploads/1/3/4/6/134611096/380487.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/sixez.pdfIn PDF document text
    • https://wurixexaf.weebly.com/uploads/1/3/4/8/134865586/sowopaper.pdfIn PDF document text
    • https://pudebotajiv.weebly.com/uploads/1/3/4/0/134012430/ruzunawiwigudojome.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/julexekubaj/jnc_8_guidelines_for_htn.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/netflix_hacked_apk_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/fulovifi.pdfIn PDF document text
    • http://manepiri.epizy.com/mopimidilinisow.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/88713272235.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/kapuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/is_capitalized_in_title_case.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/performance_review_feedback_for_manager_example.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/16813342752.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/chammak_challo_song_mp4_free.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/class_7_history_chapter_1_short_answers.pdfIn PDF document text
    • http://nuvafakidem.rf.gd/18671972516.pdfIn PDF document text
    • http://vefolex.rf.gd/devumo.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/jingle_bells_piano_beginners_sheet_music.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_off0000db95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB95 5448 bytes
SHA-256: b8c45bb6b7556658acad1da245bf06c000062d848ba1fa0a01bc3444c627af55
font_01_sfnt_off0000eded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDED 10932 bytes
SHA-256: 088c1e42e99cdab6035642cb14ac81907b942d9e665512c2b48f51bd7d7d36a5

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