Malicious PDF — malware analysis report

Static analysis result for SHA-256 55cdd3d5d45b1b0a…

MALICIOUS

PDF

70.1 KB Created: 2021-02-16 07:37:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 73076278d429606b6097ee44ab1a31f9 SHA-1: 558854a77edb1c4f1ae329773b318a045836ed4a SHA-256: 55cdd3d5d45b1b0a33891e1b10c65b065eb8e904ee539b5b50105d3f56839190
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://bologen.ru/wix?keyword=pure+one+oil+filter+application+chart PDF link annotation
    • https://cdn.sqhk.co/bexoninodag/7eAoV1E/roku_secret_menu_remote.pdfIn PDF document text
    • https://cdn.sqhk.co/bopibege/EbHidhf/96582211397.pdfIn PDF document text
    • https://veponigizut.weebly.com/uploads/1/3/0/9/130969631/623500.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/ehghjgd/jaxat.pdfIn PDF document text
    • https://kokazokurazafan.weebly.com/uploads/1/3/5/3/135348127/latijoforitevuvapi.pdfIn PDF document text
    • https://cdn.sqhk.co/nujudemugipi/Kgjehb9/college_football_playoff_national_championship_2021.pdfIn PDF document text
    • https://kisofoga.weebly.com/uploads/1/3/1/3/131383553/1061428.pdfIn PDF document text
    • http://zuraribofib.22web.org/kranjska_gora_snow_report.pdfIn PDF document text
    • https://xuxozuxar.weebly.com/uploads/1/3/5/3/135326767/vexofos_zosujiluxo.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/kovozenamofox/4th_grade_pre_algebra_math_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/lotto_boyzz_afrobbean_free.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/sainath_aarti_song.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/tobizewafanelojegusasisu.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/gusavedupasepop.pdfIn PDF document text
    • http://dewutawezidu.rf.gd/buckhorn_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/16716478234.pdfIn PDF document text
    • http://gataluxogawix.epizy.com/final_fantasy_x-_2_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/kabali_tamil_full_movie_free_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/hachette_alter_ego_1_guide_pedagogique.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_off0000d818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD818 4924 bytes
SHA-256: 2f8d48375d35169c0dfc6db89289c7f98046555b6d1ab46dc9e66ee045099309
font_01_sfnt_off0000e8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D6 10096 bytes
SHA-256: 1b2ec5c1f6b023d917fdf923ae500fd1011a9d3caf755fecaff8910972da0541

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