Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcbbfb93ec79bddf…

MALICIOUS

PDF

53.5 KB Created: 2020-09-30 23:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5fc7470d820165b68f852e450a6eecc9 SHA-1: 99037694a0d38e35f1251fe5895a50be3daadb11 SHA-256: dcbbfb93ec79bddf7c4f970658ab426d8f472523c5d4199bb4ad4779180f51c6
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://gettraff.ru/strik?keyword=kong+api+gateway+tutorial+pdf In PDF document text
    • https://site-1038505.mozfiles.com/files/1038505/jarosuginujojumegedadoxo.pdfIn PDF document text
    • https://site-1037245.mozfiles.com/files/1037245/38988989628.pdfIn PDF document text
    • https://site-1036852.mozfiles.com/files/1036852/69976868595.pdfIn PDF document text
    • https://site-1036646.mozfiles.com/files/1036646/xabob.pdfIn PDF document text
    • https://site-1036689.mozfiles.com/files/1036689/39557359241.pdfIn PDF document text
    • http://xixonumij.thesacredyes.com/uploads/1/3/1/3/131380005/zusokufemetoxizu.pdfIn PDF document text
    • http://files.amdlifestylemgt.com/uploads/1/3/1/3/131379832/fopowafikalugi-vibizago.pdfIn PDF document text
    • http://butod.ifixitcellrepair.com/uploads/1/3/1/6/131636974/labowoj.pdfIn PDF document text
    • http://funeti.cityofalpinegas.com/uploads/1/3/1/6/131637136/jugoxaz-wozetu-molewe-jebapiroxot.pdfIn PDF document text
    • http://files.q8ti.net/uploads/1/3/1/4/131438571/248b3dc5fc.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/1/0428/4514/3206/files/skyrim_potion_recipes_full_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3618/3208/files/rewar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/duwaxufezemurogagur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0388/6238/files/miperi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/how_to_hack_jurassic_park_builder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7440/3996/files/a_histria_de_yanxi_relgio_de_palc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4219/4083/files/ada_lovelace_ielts_reading_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5311/2735/files/butcher_s_crossing_john_williams.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/jasper_reports_ireport_tutorial.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF6 5076 bytes
SHA-256: 2c5bd28e04159d74ebb85beb34befd7a7d274d1ebd5b912bc5e62863a34d5541
font_01_sfnt_off00008d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D65 14380 bytes
SHA-256: e5bb0cf2b048fde26f501786d4b135fc0b4b7d8dde868b6d58f061ec61b5c403
font_02_sfnt_off0000bacf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBACF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3