Malicious PDF — malware analysis report

Static analysis result for SHA-256 62f9822265fd4c55…

MALICIOUS

PDF

39.8 KB Created: 2020-10-29 13:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2850ca74cd8b5588305a0b1549ea9639 SHA-1: e052931f4b8e938aec65cd90ce8ca4c2995c0b59 SHA-256: 62f9822265fd4c557965a655e4f3b465fa0bcb0023e403d5e48dfd92e39219d6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to external PDF files, indicating a link farm. One prominent link, disguised as song chords, directs to a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to malicious infrastructure via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/123?keyword=tasha+cobbs+your+spirit+keyboard+chords In PDF document text
    • https://guxolufesa.weebly.com/uploads/1/3/4/4/134468064/ziwoxoxapabuxe-libixuvojoruxez.pdfIn PDF document text
    • https://suludizivot.weebly.com/uploads/1/3/1/3/131383823/5058185.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/zadexusu.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/nokagabavawebamuva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/miforulijolaxapafopekafeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d703b6af-3fc0-4631-9b3c-f65c72605155/getijisudevojuxi.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/likalirikesuvulewadadudox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4442/1282/files/heavy_ball_pokemon_black.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e899726-0bcd-4135-b28a-b6bda6c8d3d4/99260607809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1017/8211/files/21889031376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8696/3373/files/introduction_to_anatomy_and_physiology_quiz_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1742/1479/files/80619415971.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/048e11cf-5caf-4472-acc4-6283965a6a77/6108760357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3603/3695/files/dancing_with_a_stranger_chords_ukulele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1889/7573/files/74768400396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c1105f5-a125-42ef-892c-807b12286aa8/kubegopoxinoju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7931/0746/files/sipumak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95764755-89f2-432d-ac74-4cb8cb303207/39713077392.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F7C 5160 bytes
SHA-256: 6c8640c043c21ff14057d8925898dcda087ce837c10642d5faab7afd744dd6a6
font_01_sfnt_off00006119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6119 10036 bytes
SHA-256: 7e47d1c55602e975326dba9333bb9780cd38d31c5340a45a6c6586318bee6f11
font_02_sfnt_off000083be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BE 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.