Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ac26a770927037…

MALICIOUS

PDF

46.1 KB Created: 2020-10-30 00:02:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: c8ad80c996a987c808b7c3eea0eb849d SHA-1: 40672f3cd47b5f99de4e5a69fef5451f92a07e3d SHA-256: 38ac26a77092703752561f72128c40788bbfeb5c78fdceba689c052a48bc78b6
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/aws?keyword=howard+university+requirements In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379970/normal_5f8e7e74b733f.pdfIn PDF document text
    • https://kavivapepegag.weebly.com/uploads/1/3/4/2/134235540/5266081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379385/normal_5f961c799a68a.pdfIn PDF document text
    • https://sopulekazixov.weebly.com/uploads/1/3/0/7/130776801/dimigete.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000068c4.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000068c4.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00009db7.bin)
    • https://uploads.strikinglycdn.com/files/d3be652a-4d54-450a-a52a-d9a011e5acb7/watch_creed_2015_online_putlocker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b4e6c86-abfc-4591-a409-5b594e1cbdea/wifuvirolijib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4565/2133/files/95071083520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee5e1218-9ebe-4218-a6b1-6e9e90afa1e9/93453344509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4721/9100/files/dowibezam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fff80b91-e7e8-463e-a9db-01464c90c2f2/73002428208.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4768/8091/files/kuvotedejevajamamiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a718339c-20fb-4d45-a967-ef2669d0e1d2/megulidubaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0307/4984/files/44139749217.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/7129497208.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 extracted file (font_00_sfnt_off000068c4.bin)

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_off000068c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68C4 5164 bytes
SHA-256: 3a2016eec7f2a641efd9d31794556d9313dec0b1398537ecec0be22e6e13f992
font_01_sfnt_off00007a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4E 10448 bytes
SHA-256: 8f72b111a4564a42d6a53d0645459b32fc171b006c91ad4bd90ee4bbca0d0af2
font_02_sfnt_off00009db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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