Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcbe1bda085432d0…

MALICIOUS

PDF

48.3 KB Created: 2020-10-16 07:33:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 21dd3df9abef5fb0252a75ca00ed71bb SHA-1: be484e3d07d5711af2ae1edc8cfe3e39f5f1f72a SHA-256: bcbe1bda085432d06a21d3853e2b094e5b11705e482b5663eb7075f69ed88617
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://ggtraff.ru/pify?keyword=ridgeway+by+kelty+tent+instructions In PDF document text
    • https://site-1040239.mozfiles.com/files/1040239/paxodunivole.pdfIn PDF document text
    • https://site-1039612.mozfiles.com/files/1039612/sabenuwozamoranazexa.pdfIn PDF document text
    • https://site-1041286.mozfiles.com/files/1041286/75856077900.pdfIn PDF document text
    • https://site-1039896.mozfiles.com/files/1039896/38254598071.pdfIn PDF document text
    • https://fifowekuvepu.weebly.com/uploads/1/3/0/7/130776735/tidotamugexas_rezadav_rodogipi_ximeputube.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/5073021.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/c6c9fe7ad41f6e.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/xekena.pdfIn PDF document text
    • https://site-1040998.mozfiles.com/files/1040998/74144109923.pdfIn PDF document text
    • https://site-1044243.mozfiles.com/files/1044243/nilikomimivopi.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/1/0476/5794/3206/files/how_tall_is_madonnas_son.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7029/8523/files/lupufizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7781/1358/files/acetonitrile_water_boiling_point.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/8059/9702/files/star_wars_battlefront_2_ps2_unlockables.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8340/8571/files/10932701933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6597/4440/files/town_of_maynard_dpw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7337/1300/files/aegis_legend_kit_battery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4469/9799/files/rufixebisumewoniloto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60780a6d-aaf9-46c4-a0a4-228173b24513/98655346182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5f99e8f-85ca-474a-ba52-81f8f5351213/30394009909.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_off00007c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6C 5512 bytes
SHA-256: f9d4cc40a4bea37b81a6681cb7cc87e4fe132aa04b7f98475e04f2ce5ad5718f
font_01_sfnt_off00008f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4E 10652 bytes
SHA-256: 24806eada89f7884df9d27674fae4e1de76f62fe990ac385e24c1e6b222df38e