Malicious PDF — malware analysis report

Static analysis result for SHA-256 9929f5e3704cd2b9…

MALICIOUS

PDF

77.5 KB Created: 2021-03-10 13:54:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6501334c1d24643c1fda379ed18a8d9a SHA-1: 5c13b5590c9c191b7cd58a7f922b4b98e0fe7a04 SHA-256: 9929f5e3704cd2b92f65ccc646a11c9b5e370ca890c48ecca51dc27ac43a2f6d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://botokaw.ru/wix?keyword=chapter+38+digestive+and+excretory+systems+section+review+38-2+answer+key PDF link annotation
    • http://ionatr.fun/willmar_500_fertilizer_spreader_manual95p0f.pdfIn PDF document text
    • http://bionatur.space/css_list_tutorialspoint01z3b.pdfIn PDF document text
    • http://gesaribenufemi.iblogger.org/brahmi_lipi.pdfIn PDF document text
    • http://wabefovelixi.66ghz.com/cease_and_desist_letter.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/levovod/wooldridge_introductory_econometrics_solution_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/kelen.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/chlorine_lyrics_video.pdfIn PDF document text
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_154600c5f4c543198daeca30880c1c21.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fosawef/meximuduwolidase.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/guided_by_voices_tour_review.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/speed_booster_apk_for_android.pdfIn PDF document text
    • https://0f926834-650c-4d5a-b53c-ad60ae412ccc.filesusr.com/ugd/6a44d8_d0dd81af852d4879ba7ad97411f5d2b2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luropiw/sikepakogimofuwowekonowe.pdfIn PDF document text
    • https://0c17d2ad-06a2-4efd-9128-26148cac6670.filesusr.com/ugd/44320b_63f98879cb3847c396987ad3311f3f65.pdf?index=trueIn PDF document text
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_12d6a2caa78541d0bc0a7ee39e91d3c0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pasawe/months_of_the_year_template.pdfIn PDF document text
    • http://mawuxukajenup.rf.gd/companies_guide_amman_stock_exchange.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/british_guidelines_for_asthma_management.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_off0000ede6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE6 6268 bytes
SHA-256: 310fede6a4b80faa6286dc35adb960be628a0392ef359e42f9a0f1f27287ef1c
font_01_sfnt_off0001032b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032B 10948 bytes
SHA-256: acf671eb92b449e91d96570ed58da9f44cd1f01af6abfac99a147fb2a253fa54

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