Malicious PDF — malware analysis report

Static analysis result for SHA-256 37cd4a27a04b8696…

MALICIOUS

PDF

47.9 KB Created: 2020-10-04 15:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 702b592f8330f74eca5917bf46795ebd SHA-1: fd8409d94fc7b4cfd0fcbfe9e8d17e99f2bc81a4 SHA-256: 37cd4a27a04b869698d247beadc5027180435e9d6dc1edb69ea6ae3b3ac28197
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=ling+tosite+sigure+unravel+acoustic In PDF document text
    • http://files.magalieswellnesscentre.com/uploads/1/3/0/8/130874489/nubuwuxoxipug.pdfIn PDF document text
    • http://files.nicoledrakewright.ca/uploads/1/3/0/8/130874493/kugefipixeg_xawoguka.pdfIn PDF document text
    • http://nakimapi.physiciansprimarycare.org/uploads/1/3/1/4/131406841/6740005.pdfIn PDF document text
    • http://dilodu.chocolaticity.net/uploads/1/3/1/3/131383841/dikugogejo.pdfIn PDF document text
    • http://files.juliamusi.com/uploads/1/3/1/3/131379033/0ba9f87f.pdfIn PDF document text
    • http://silefe.jihyunhong.com/uploads/1/3/0/8/130814687/zizeginomuxavegi.pdfIn PDF document text
    • http://files.dontbeacrashtestdummy.com/uploads/1/3/0/7/130740551/perulunekezabo_lurodikerifowa.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/1/0433/2060/6885/files/sexejikonuwixomenumixodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5224/8471/files/puzani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/2243/3686/files/87671257401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/soap_box_derby_car_for_sale_craigslist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9996/6628/files/dust_bowl_map_activity_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9946969-a415-4b18-9acc-c1ab79f1eded/65896425351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e795f82-7902-43e5-bf84-092eb224aee8/posesiwipituderumod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f2f53f1-63cb-40b4-9752-bc3bca6869a3/58132293657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59ea43c0-0b49-4922-949d-253523d10689/94437305286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bb1ae3c-4dad-499c-8e64-2fd79b9a8368/metevem.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

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_off000054aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54AA 12316 bytes
SHA-256: d983163dd8ec94254542ea288800786ae4bfe30f866d4acbfafe5d3a355627f2
font_01_sfnt_off00007d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D24 4968 bytes
SHA-256: c2779eb598d1f307baf3211bcb5035bf2dd376abe16296a846a63d3b06cfbf82
font_02_sfnt_off00008e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E2C 10764 bytes
SHA-256: 376fd842fee8defd54f74a04efa2a39d29be2e0750ae7103108f4168188fe52d

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