Malicious PDF — malware analysis report

Static analysis result for SHA-256 49de21d6284dd643…

MALICIOUS

PDF

49.8 KB Created: 2020-11-07 02:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 69ce0ae47d71eb65c133adbcd035e147 SHA-1: 2c85190b0bf41a7614adcd6bcb18caf0add4d013 SHA-256: 49de21d6284dd6432bb439c77ed36fc23bd3714e7016b3f478880518660fd395
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://traffking.ru/aws?keyword=natural+resources+in+new+jersey In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5fa3e48ccc9f3.pdfIn PDF document text
    • https://xexovelez.weebly.com/uploads/1/3/0/8/130813416/0791639529eb41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412379/normal_5f9ed9745dec5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5f873de9c335a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384026/normal_5f8c068d75f95.pdfIn PDF document text
    • https://lonunibulitog.weebly.com/uploads/1/3/4/4/134498578/2429975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425256/normal_5fa39efaa6324.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/lodazojamuva/16674854171.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/abordagem_burocratica_da_administrao.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/zajupevir.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/incentive_program_for_employees.pdfIn PDF document text
    • https://zibigavaj792939488.files.wordpress.com/2020/11/jorizopapoli.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_off00007667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7667 4912 bytes
SHA-256: bad3a042ac8f9b4295cbbc78d3373101b32a85b70b439b4c6ecc262dcec081d9
font_01_sfnt_off00008744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8744 11260 bytes
SHA-256: 2539bfc23793f733e6a0947840ff2a60c854a2ce87bede0fba1f4cd29de01b2c
font_02_sfnt_off0000ac46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC46 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e