Malicious PDF — malware analysis report

Static analysis result for SHA-256 a484208eb111fabc…

MALICIOUS

PDF

76.4 KB Created: 2021-02-22 06:44:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bed07d8ef3f1c15eb2db94f881801681 SHA-1: d6077cf525fa33c712a0ebc38ef005ebfde34baa SHA-256: a484208eb111fabcad17df8acdd31d90aed65d1410e4544d23609a024101df26
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious phishing content. It contains a large number of external links, many of which point to SEO redirectors or potentially malicious domains. The document body, though heavily obfuscated, suggests a lure related to search results or informational content, consistent with phishing tactics.

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://druttle.ru/123?utm_term=how+often+to+clean+a+glock+43 PDF link annotation
    • https://cdn.sqhk.co/pimibopugugo/ggiaFJA/zombie_sniper_shooting_3d.pdfIn PDF document text
    • http://familyit.info/how_many_calories_in_a_taco_bell_chicken_chalupa_supremeecdh2.pdfIn PDF document text
    • http://opticsystem.website/bevosik4frpu.pdfIn PDF document text
    • https://bokosemebejira.weebly.com/uploads/1/3/0/8/130813317/diwakubologunow.pdfIn PDF document text
    • https://cdn.sqhk.co/mifodirula/g1Hcahi/mujowijanowutefewaj.pdfIn PDF document text
    • http://varistop.site/chronicles_of_narnia_characters_nowazqdx.pdfIn PDF document text
    • https://muxiduxipa.weebly.com/uploads/1/3/5/3/135319221/pepafig.pdfIn PDF document text
    • https://cdn.sqhk.co/mipekakiri/0ifClje/51359086407.pdfIn PDF document text
    • http://mmmmmme.space/integrated_science_questions_for_jhswxysg.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/gcAijlL/loopy_case_warranty.pdfIn PDF document text
    • https://fovokutiro.weebly.com/uploads/1/3/5/9/135985190/4294153.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/towutoginadivu/corsair_k95_platinum_xt_software.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/can_you_win_the_lottery_in_sims_4.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/tencent_holdings_limited_annual_report_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/63825470556.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/gixatisidisepasamataxe.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/potaj.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_off0000ed61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED61 5144 bytes
SHA-256: aab304f4ac27771bd4e8f40782fc0d2e617e0cbc81bfa5e9d467d51982bc506a
font_01_sfnt_off0000ff22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF22 10928 bytes
SHA-256: 1432f90c0e55a48f2232b3fc41e8aace38882496a9773650c4f5efc4dd42c9e8

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