Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9d74617eceb9fa…

MALICIOUS

PDF

69.9 KB Created: 2021-02-23 17:22:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ca2e890f4117241830c4151dafb8f95c SHA-1: ba983c02984e035939d9892a84dc603160464623 SHA-256: aa9d74617eceb9fa24c1b3edd22b9dcf7b839ce47c2e897e30245cea9e27554c
196 Risk Score

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/wix?keyword=nc+dmv+tag+office+greensboro+nc PDF link annotation
    • http://desenusexewu.iblogger.org/facebook.com_account_settings.pdfIn PDF document text
    • http://matcobzor.ru/idsa_guidelines_pneumonia_2016jq7lr.pdfIn PDF document text
    • http://e-sparks.ru/22766857133ojax9.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/nijhdWH/pandemic_board_game_rules_simple.pdfIn PDF document text
    • https://zikixitifo.weebly.com/uploads/1/3/4/8/134897390/wigidowipogo-kinadow-piligufefexezo-gozabusofug.pdfIn PDF document text
    • http://pufemebulod.22web.org/fuvawege.pdfIn PDF document text
    • https://cdn.sqhk.co/fexonawizoz/MjTgdvL/capsule_hotel_nyc.pdfIn PDF document text
    • http://vamoktin.ru/babington_house_school_nursery_uniform6r518.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pikididubemet.epizy.com/jct_design_and_build_contract_guide.pdfIn PDF document text
    • http://palipesokugukux.epizy.com/giragubumaworigipebozojaj.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/resume_template_for_mac_free.pdfIn PDF document text
    • http://bekelogamaju.rf.gd/borivawi.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/65239909684.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/bilanoferedib.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/55609612488.pdfIn PDF document text
    • http://pebabub.rf.gd/developed_and_developing_countries_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/62214830524.pdfIn PDF document text
    • http://xuperag.epizy.com/946791621.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_off0000d4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EF 5480 bytes
SHA-256: ec7cfbc3337d43ef48630a2a3de959a01746a065326da445f1e361933dead6bc
font_01_sfnt_off0000e789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE789 10296 bytes
SHA-256: 7b8bca78a2781273ea53320526ab9fa9f8cfd14c98cd23d8946745edbe097af7

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