Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a7444e21913317…

MALICIOUS

PDF

70.6 KB Created: 2021-02-10 09:21:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6f6b1d739b460e027e76e3d7ab743af6 SHA-1: 117b894f02d5a01931af81abce00f53ce0175889 SHA-256: 65a7444e21913317d968212e8e77d206d9ec3730d7fe0994987101ac8f5d6e5c
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/aws?utm_term=punjabi+audio+song+dj PDF link annotation
    • https://jupedozezuwobig.weebly.com/uploads/1/3/4/0/134040413/gigotijapurewala.pdfIn PDF document text
    • http://damvglaz2.xyz/anatomy_of_the_constitution_preamble_activity_answersm27u4.pdfIn PDF document text
    • https://cdn.sqhk.co/derepinejabi/gUWZmMz/38061359345.pdfIn PDF document text
    • https://cdn.sqhk.co/buganisazobu/d8jglji/zezinefilobitigagovom.pdfIn PDF document text
    • https://filofasifujutoz.weebly.com/uploads/1/3/0/8/130874575/temix_volaxuvolemu_virukavemuze.pdfIn PDF document text
    • https://cdn.sqhk.co/mujejadalale/gfnggZH/best_outdoor_cat_condo_for_large_cats.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/wufujudisu/minoxidil_in_natural_form.pdfIn PDF document text
    • http://wepebafefik.rf.gd/regulatory_reporting_jobs_in_mumbai.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/21546579632.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/ti_83_online_calculator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/business_budget_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/lich_king_hearthstone_guide_2018.pdfIn PDF document text
    • http://tutivute.epizy.com/sijes.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/acute_pancreatitis_acg_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/alarm_tone_free_for_mobile.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_off0000d517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD517 5084 bytes
SHA-256: b8d8308b137a7f3bbcfa4145a6de795ccd4deaf90ff4f125a4c4e97a7877508f
font_01_sfnt_off0000e674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE674 11140 bytes
SHA-256: 7191039d2f8f6bb7b075271c2381f81a92f75319577d2eb92228f54097eb4261

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