Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa595856ebd56548…

MALICIOUS

PDF

36.6 KB Created: 2020-11-09 03:34:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 557d7b7bc9565390f683e3c8f6bba2f1 SHA-1: f98ee8f46818c3412c30456779fc59d1004cd4a0 SHA-256: fa595856ebd56548a9e5ecb3ba0b0a6aedf3916ee6f0548129547bd0f29d10d3
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/aws?keyword=sugar+cane+juicer+machine+presser PDF link annotation
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/9223665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418981/normal_5f9f57e4edcea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418746/normal_5fa2bf32d4e45.pdfIn PDF document text
    • https://zodovamerevi.weebly.com/uploads/1/3/4/3/134316438/3798991.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/18588163-5f29-4b02-9132-5a028e9a938e/rejumupovixenaguwiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85e5b3b8-7592-4bd3-874a-46c2042d80ff/mapa_colombia_ciudades.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0020efb-3db8-4e86-9a22-d35a52bfdf33/arcade_fire_radio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69423f8c-eb7b-4e0c-8408-69b7e75bd98c/lasimekivetudifadap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7311d8c-3e61-410c-97d5-fa875716674c/wogol.pdfIn PDF document text
    • https://tirutijupez.files.wordpress.com/2020/11/kobogapofadusadi.pdfIn PDF document text
    • https://wazewezobe.files.wordpress.com/2020/11/tumafasoxilezob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/282af290-85d4-4818-b002-63d0faab5b49/tevonevem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4876ae4b-6041-4868-bacf-20b759bd5bcb/acid_base_titration_lab_flinn_scientific_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c77d2560-dc09-494c-9bb8-fac9fb13ac95/team_kirby_clash_deluxe_passwords_usa.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_off0000486e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x486E 5188 bytes
SHA-256: cf7347805ae5bc21b2fdf03dde9c5ecac373486dd4e9ab43464dfff731879ae7
font_01_sfnt_off000059d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59D6 8792 bytes
SHA-256: c7685d1a03865168f14e15baa6b294b34c2da4b994c187754f8cdb7ddcae4f46
font_02_sfnt_off00007753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7753 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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