Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fba92081c7c2f91…

MALICIOUS

PDF

44.2 KB Created: 2020-11-08 11:42:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 665593fd6ac5c9f40098e121baab1669 SHA-1: 6cd5b256acd44ef19bc06ecc9a1527baa8607e02 SHA-256: 6fba92081c7c2f9160c8effe80781eacc7922b7d6f11d0ac72b9f7afa26f4f6d
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=booker+t+and+web+poem In PDF document text
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/xovezivokat.pdfIn PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/tusulemogisizi.pdfIn PDF document text
    • https://xemojunaxumig.weebly.com/uploads/1/3/4/2/134265853/9308677.pdfIn PDF document text
    • https://damokilusul.weebly.com/uploads/1/3/4/4/134463963/19446709c3987.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/wirokuwofubonoderax.pdfIn PDF document text
    • https://tugoxalimirufa.weebly.com/uploads/1/3/4/3/134310877/d8b180ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/da9cc79a-8725-4d8c-80b2-3eebdd190ccb/41513918314.pdfIn PDF document text
    • https://moxufovurulo.files.wordpress.com/2020/11/26608046222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ad8287-8234-49ae-a432-076f67671e4b/21111099521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db67806e-27af-4f56-b196-1df818e48df8/vofugomefipim.pdfIn PDF document text
    • https://kubodal.files.wordpress.com/2020/11/68385468255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bf83ba9-2529-4e58-9f47-ba2e8bcb2c6c/63852840583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9636e83c-0d95-4e5b-8002-b2745d32bbba/good_news_bible_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/display_advertisement_format_class_12.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_off00007002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7002 5240 bytes
SHA-256: 1964bd6a1fd89319ad4037f65719c6c5888c2e5ed62754d9467b12fee182f567
font_01_sfnt_off000081d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D3 10144 bytes
SHA-256: 13dd52dcedcbf596a392c9299c6b2fb9ecbe825c8be02837d9ef5b4042157965

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