Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7dcd9d598a2a3c9…

MALICIOUS

PDF

54.2 KB Created: 2020-10-03 09:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 13034797e3abf938ee3846817e708f91 SHA-1: befce886f3c63766870a468df010a9d8a91968e4 SHA-256: f7dcd9d598a2a3c94486b0f0a95f2c6265d8dadfc4834909b8584476efffb525
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=charles+t.+tart+altered+states+of+consciousness+pdf In PDF document text
    • http://files.makethisout.com/uploads/1/3/1/8/131856271/8364244.pdfIn PDF document text
    • http://files.elexadawson.com/uploads/1/3/0/7/130739328/bosev.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://uploads.strikinglycdn.com/files/924de148-cae2-4796-b3f5-1393bbe042e8/61827207956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adb64086-4365-472c-a999-dcafd06d5478/xilupuvevebomazevude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1969c63-844e-46bc-a815-147dd96cb16b/60374378995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fb463c3-cb11-4399-babb-93b037707d9e/rigonobasadexupes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e26eedd1-f818-48a0-a759-305bf3495d9e/mefib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b8f4b51-3eab-420c-8844-62df912d0e7c/rofejurodikimufoxevexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb5e1943-4d86-4ae1-badc-6e0a5cc32b0d/96049438907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72d5e9fa-07d4-4179-bc8f-49538a9b7cba/86705074149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/739b1669-79a2-48e0-907d-f1e5306d56ba/fujatave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c24ad7f4-3b5c-4842-adc8-4dc37b4baeee/32016395068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1034/2563/files/zuluvej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3051/9709/files/23570929526.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_off00008862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8862 5180 bytes
SHA-256: 493d0b4e80e3700fe516c148f535de2163bfba73dee240d7641d2d0d44485f0a
font_01_sfnt_off000099fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99FA 10344 bytes
SHA-256: 1b29ea6ca0ef503ecfdad9b148e8b28e5846d805dd0b46117575c2dc7e8a3578
font_02_sfnt_off0000bd66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD66 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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