Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e3b8335ff717bd1…

MALICIOUS

PDF

41.4 KB Created: 2020-10-08 23:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 656959462df75a0586f70165c0d6d28c SHA-1: e5167cb4a4a46a1c1560185436c155a9ffb31434 SHA-256: 6e3b8335ff717bd18d423ec58ad92ca405b290387821c9da60533c1e70890aa1
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=math+crossword+puzzle+worksheets+6th+grade In PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/88565921370.pdfIn PDF document text
    • https://site-1039456.mozfiles.com/files/1039456/pixilixepilekiwi.pdfIn PDF document text
    • https://site-1042740.mozfiles.com/files/1042740/sobaxulofobilivew.pdfIn PDF document text
    • https://site-1042822.mozfiles.com/files/1042822/govilagasivijovofinunu.pdfIn PDF document text
    • https://site-1036900.mozfiles.com/files/1036900/35413360126.pdfIn PDF document text
    • http://bilopola.joshuaybarbo.com/uploads/1/3/0/9/130969656/bcfd71e4d963f9.pdfIn PDF document text
    • http://files.drjoybozzo.com/uploads/1/3/2/7/132712661/lujej.pdfIn PDF document text
    • http://files.shefaholistic.com/uploads/1/3/0/8/130874350/4c97d9b.pdfIn PDF document text
    • http://files.northcountryquiltersvt.com/uploads/1/3/1/3/131381991/fapibuzaseke.pdfIn PDF document text
    • http://files.varvelsporthorses.com/uploads/1/3/1/6/131637853/bitinenobiwiwizuxufu.pdfIn PDF document text
    • http://vusoduj.sirtomfoolery.com/uploads/1/3/2/6/132696113/niselaposotad.pdfIn PDF document text
    • http://files.theperpetualmaker.com/uploads/1/3/1/4/131406075/madimiwazigefi_semolibekovomaz_ginuliwuv_sisisupopet.pdfIn PDF document text
    • http://files.manchestercbtclinic.com/uploads/1/3/1/0/131070526/moxuw-vazukele-kulodilabot-bozoziwofo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7891/4726/files/39234763184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5591/4918/files/fl_studio_mixing_and_mastering_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0826/1285/files/old_english_bulldog_puppies_for_sale_mn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7987/6252/files/catcher_in_the_rye_chapter_7_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3408/3996/files/gisiso.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000557e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x557E 5428 bytes
SHA-256: 220d83d355fdff0ae42692ea4dd4ca6b0e4c9758e0b613dc2c5e855cc36344c5
font_01_sfnt_off0000682c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x682C 9984 bytes
SHA-256: 7dd9918f6465e12c635ea79057cf909e3139768af0ea06456dcc99b852220838
font_02_sfnt_off00008a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A58 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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