Malicious PDF — malware analysis report

Static analysis result for SHA-256 546bee3d77717498…

MALICIOUS

PDF

79.0 KB Created: 2021-03-27 19:21:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a0e1988845ccd3a2c21f39f49569ba3 SHA-1: 701515c090c1fce35c93d9186c764323e4abe1a9 SHA-256: 546bee3d777174987c40af5bec21cfffdc2373768453a2d20bfde0326802a5a9
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' pointing to a large number of PDFs. The embedded URL 'https://mezovuduw.ru/wix?keyword=utility+trailer+lowes+canada' suggests a lure to a malicious site, likely for phishing or malware distribution. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/wix?keyword=utility+trailer+lowes+canada
    • https://retotanenumu.weebly.com/uploads/1/3/4/0/134017544/51f28bc.pdf
    • http://tabikola.online/what_does_icao_annex_17_specifyxt94r.pdf
    • https://disaximineta.weebly.com/uploads/1/3/4/8/134883765/4358796.pdf
    • http://fortuneo-enligne.com/220541382624mvum.pdf
    • http://netlysy.online/how_to_write_a_fiction_story_step_by_stepo7edz.pdf
    • http://yoganchik.space/3699619906jhsd8.pdf
    • https://sovawetozinunur.weebly.com/uploads/1/3/1/4/131407226/safipirav_rojifevewano.pdf
    • http://civiliscmq.online/ccna_v6_espaolaum3c.pdf
    • http://doweryklkq.space/what_is_the_main_purpose_of_an_articlebe0sl.pdf
    • http://tugrull.com/83575109782m0evv.pdf
    • http://biolinkus.me/30513427906fmo8c.pdf
    • https://povarudoro.weebly.com/uploads/1/3/5/3/135324530/pomegegoz-dozesopejub-sukopewetaxadif.pdf
    • https://cdn.sqhk.co/feripamapuv/jQGqNhf/grow_empire_rome_game.pdf
    • http://soldonlittleton.com/148487636719a83z.pdf
    • https://dagigofeno.weebly.com/uploads/1/3/4/8/134887245/xabakasavo.pdf
    • https://cdn.sqhk.co/kifuzopeko/dEGzYii/16482083360.pdf
    • http://lovechat24.club/mikevotikazifuk83cp0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fajonubinomeder/2688563794.pdf
    • https://s3.amazonaws.com/legenapi/mozilla_firefox_49_free_download_for_windows_7_64_bit.pdf
    • https://s3.amazonaws.com/vesubodufisi/best_squat_form_for_long_legs.pdf
    • https://s3.amazonaws.com/dosalapasenow/southern_living_german_chocolate_sheet_cake_recipe.pdf
    • https://s3.amazonaws.com/tikoweravisixu/new_album_songs_audio_free.pdf
    • https://s3.amazonaws.com/fizup/libadetejazepopowas.pdf
    • https://s3.amazonaws.com/suzixegazunow/74471600142.pdf
    • https://s3.amazonaws.com/xapidajovaji/77615734437.pdf
    • https://s3.amazonaws.com/feseni/14529043402.pdf
    • https://s3.amazonaws.com/xalasawu/bisomelefixageniw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f81d.bin
2d921a9baba464d1bf319e8dd956051cefec17a64a0528c7675c028a46a3efaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF81D 5120 bytes
font_01_sfnt_off000109ab.bin
1094fda60c0e618d26e2020140233c31f23a19c50f2076fe85b2af55169eff10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109AB 10840 bytes

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