Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3319db40b29d246…

MALICIOUS

PDF

44.4 KB Created: 2020-10-20 07:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 3503d7f323098dfc058d001c63364cb2 SHA-1: 19f922b1e168273189b7fb0a4cfa3cd3c2b51c07 SHA-256: c3319db40b29d2464a599af137ddb5d1975fb8902399828e70fb9a6bea9b4660
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://ttraff.club/123?keyword=unisa+referencing+guide+harvard In PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/5c8c771e4df88.pdfIn PDF document text
    • https://nelibijejukeli.weebly.com/uploads/1/3/1/4/131437261/0feaf55178ef.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/2691997.pdfIn PDF document text
    • https://tuxitusonodedin.weebly.com/uploads/1/3/0/8/130873989/tojulifevinibi.pdfIn PDF document text
    • https://lotagixowila.weebly.com/uploads/1/3/1/1/131164100/balibusoxuriduze.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/b0edb7c76d5b12.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/miwijunuruxodot.pdfIn PDF document text
    • https://nurekagenarufab.weebly.com/uploads/1/3/1/6/131636906/zenunazobi.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/7496959.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/5036761.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/3590787.pdfIn PDF document text
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/6f62a85d.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/ad035489b3d.pdfIn PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/f02d87204da67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9125/5713/files/progressed_moon_transit_8th_house.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7626/3841/files/exploring_art_5th_edition_download_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1960/7457/files/que_es_un_ensayo_descriptivo_ejemplo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/70036829730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0133/8280/files/gumijek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4528/5799/files/heathkit_sb-303_schematic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1752/5188/files/judik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5664/3739/files/71337431341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9543/9000/files/tom_brown_tracker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7065/2061/files/the_night_stalker_2016_netflix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0315/3048/files/vanish_gold_oxi_action_instructions.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58FE 5300 bytes
SHA-256: 55bc1a9e958ac2952704648ce800d23c1126dddb1da3cddf921a31c5a9f63fb1
font_01_sfnt_off00006afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFE 10360 bytes
SHA-256: 8216c891c8a139ee6e923c0c58b6d268bbaebe58e88a3dcf81a3d4304c01e437
font_02_sfnt_off00008e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E9D 16144 bytes
SHA-256: 18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b