Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b60b8c8d9c1cf61…

MALICIOUS

PDF

40.4 KB Created: 2020-10-27 09:30:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: aa04e1133657f9c6a2ce82f055ab8d8a SHA-1: 2903008c4ad9acd373fa466f4646891ca101c74d SHA-256: 7b60b8c8d9c1cf61f2af1cc8b00429aee4890a26b73033bc16f9ce36a4998bf4
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://cctraff.ru/strik?keyword=we%2527re+going+on+a+leaf+hunt+steve+metzger In PDF document text
    • https://weropejo.weebly.com/uploads/1/3/4/3/134321986/5899449.pdfIn PDF document text
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/wesivelanirufes_wojuxigo_muvoni.pdfIn PDF document text
    • https://xexogabowagub.weebly.com/uploads/1/3/4/4/134438270/kokusavimori.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f87595d0894b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f875248d50ba.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/9285497.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/3582242.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/9755694.pdfIn PDF document text
    • https://mogunugive.weebly.com/uploads/1/3/4/3/134381007/3a4d099f1fa.pdfIn PDF document text
    • https://nofizosol.weebly.com/uploads/1/3/4/5/134500220/pemimu-sexit-mokikapaf-rinoput.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/zisobujudud.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/saloviganepepi.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005e15.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005e15.bin)
    • https://s3.amazonaws.com/risisipajole/26586239764.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/sixalipejonizuzabepize.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/isomerism_for_neet.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/bachon_ki_urdu_kahaniyan.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/adobe_after_effects_cc_keyboard_shortcuts.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/characteristics_of_the_holy_spirit.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/wemukegonoxipenu.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/bifacial_solar_cells.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/ave_maria_caccini_clarinet.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 extracted file (font_00_sfnt_off00005e15.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E15 5336 bytes
SHA-256: a92592c3223afbc8078a90073ac712463639c3844e968e78abb68f84c7072f21
font_01_sfnt_off00007030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7030 10504 bytes
SHA-256: 32fb46d9f8c86abebb56a77da09b7f55d2f54f9c577d34277215819641a8de2e