Malicious PDF — malware analysis report

Static analysis result for SHA-256 f338ad127bebc3cb…

MALICIOUS

PDF

50.9 KB Created: 2020-10-16 09:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6a8ec04d76b505474a0c6bd86834cad3 SHA-1: 27d49936a18e1005189b1f7dcbe78ec43cd3ee8d SHA-256: f338ad127bebc3cbe68201d323127b042741841aeaf0d9eddab083c40da689ed
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://ttraff.cc/pify?keyword=modal+auxiliary+verbs+worksheets In PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/3cb113af6.pdfIn PDF document text
    • https://tajurasexir.weebly.com/uploads/1/3/1/6/131606020/jegojes.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/lebof-jekifugivavane.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/2a5b38eef3430.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/ce02014a20d.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/jixidused.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/2550438.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/debizikirapanas.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/499ea575.pdfIn PDF document text
    • https://fusesekomufe.weebly.com/uploads/1/3/1/6/131606177/rakivavobegoralaxun.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/bigunurusipota_vovavubavuw_malolipesafa.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/5b623c8c-0d58-4964-a2be-8961a127d3c7/30492692526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db085772-4338-4319-85f5-08fe39d0f53e/desaronek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0c8afeb-5e1b-4ab4-8b4e-29d55e79d6f1/gunaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43bb005d-5354-4dfa-9adb-06acbcbaf030/93141980079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b635b1d9-d79f-4bd8-b327-4fe03a5cdb3d/nuzejitaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea01fb4a-5c5a-47ec-a629-838293249c45/sonaxezama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b897d5-81f1-4908-979c-8bf1f8b7cb65/6216049770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fcf1ed8-2333-423f-aa79-46307ede05d0/talotedimufovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/847b8f71-35ed-4b05-b66a-51ac076570b0/3281813828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f26493-c71f-48b2-a479-e798323cf006/relironepubarudisel.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_off00008741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8741 5444 bytes
SHA-256: c5470b0de0e5d93b619fc900667735d75e61169e65960d08797d91201b487568
font_01_sfnt_off000099de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99DE 10584 bytes
SHA-256: 42e155a35da85acb88dd2a2ac7614c31ed5abaa7bf7f621bb584b0a2eae9dbbb

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