Malicious PDF — malware analysis report

Static analysis result for SHA-256 62fcab5340683005…

MALICIOUS

PDF

71.0 KB Created: 2020-11-08 12:52:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 70d6ac81bde65eb6feb01995d31684ea SHA-1: 4fe3ffe0a58290237db53d6209a4897dc42914a6 SHA-256: 62fcab5340683005c86a4c544309235ca1c728253290e908b260a7e72dd8055e
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://traffking.ru/aws?keyword=short+oc+bio+template+amino In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393890/normal_5f90d4ce1a7d0.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/4752109.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/6035995.pdfIn PDF document text
    • https://mesedegusi.weebly.com/uploads/1/3/4/6/134600151/6864613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f89f4eb582cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_5f8e7d4605ca9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tusomoxuxa.files.wordpress.com/2020/11/boundless_biology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4631adb1-9c6a-4ba0-a769-54ceebbb1d23/reinforcement_and_study_guide_answer_key_biology_chapter_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c0b4e9b-7c0a-49fa-8d8f-f24ec96e15eb/womenakipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a2e7115-2498-4bea-9ca6-8ea3371d2d23/99585029574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55eecd7f-87fe-45ed-8ec4-0459948fd501/toshiba_model_39l1350u_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/773bbdad-e077-47ea-b250-c2e785aa9a65/wezigotipaxiboriwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00b12eb2-992b-4856-ab29-91e0f1ccc56f/frankford_arsenal_wet_tumbler_capacity.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE0 2860 bytes
SHA-256: c47741f98f44674c31288dc5deb863d2dc0216b513aa0671491fa98fdc786314
font_01_sfnt_off0000a816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA816 5240 bytes
SHA-256: 41e279c0551350df2286cc0b17275f60ccac7164e8ea07f36add0ad0902ad0e5
font_02_sfnt_off0000b9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B1 2320 bytes
SHA-256: 8f4a7dc02fefe5524df185d553b482a907875a395b22a835327c5e07e8be8aad
font_03_sfnt_off0000c3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F4 14068 bytes
SHA-256: 7581f9f759796e6b16fb7a9979f5a625a7271fe91f2147e574e1fb987d73673e
font_04_sfnt_off0000f098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF098 17820 bytes
SHA-256: 03525b6cb32f4f252d690b658c4bb86f1cf39917287bf4b537288cdbd8b3aea3

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