Malicious PDF — malware analysis report

Static analysis result for SHA-256 a300d35663b0dcc7…

MALICIOUS

PDF

39.4 KB Created: 2020-11-08 12:44:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 150ff679c6ad9ca64898c4cfc5b4bec1 SHA-1: edded302c80b49cd50c010464ed7c76356785561 SHA-256: a300d35663b0dcc7d3fbd82a782793738324d9b7c0b9de22a0e5cd583705de0a
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://trafffi.ru/123?keyword=mastering+chemistry+chapter+2+answer+key PDF link annotation
    • https://sokegipamemaxo.weebly.com/uploads/1/3/4/3/134345901/d691343e.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/guzedewadarilez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461791/normal_5fa5837bcfd6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410217/normal_5f94c303ae22a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419640/normal_5f9b465acf6a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383475/normal_5f8d398e15a68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407316/normal_5fa29f21828b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380379/normal_5f9f2e3823b64.pdfIn PDF document text
    • https://pimupaxepa.weebly.com/uploads/1/3/1/8/131857198/viwixed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f904d29bbc49.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gezetega/pro_tools_10_ilok_crack_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/delonghi_ew7707cm_oil_heater.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/vefowinirebopizinujazo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B46 5712 bytes
SHA-256: b7e9cb52ae0d533f9352215d0afb20071b3f18238aeb7ccec7ab255faeabf9e2
font_01_sfnt_off00006ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBF 10088 bytes
SHA-256: 78b3ac7b3cabe04848822e1b6ddb5eae1a1491bc3c40c86517bb81a0d3420db0