Malicious PDF — malware analysis report

Static analysis result for SHA-256 8393e1da7ed46d5b…

MALICIOUS

PDF

74.9 KB Created: 2021-02-20 15:55:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 50224bc45910f7a8537b240a5dbb315f SHA-1: 0e3dc8454a6089ecac40fdc50343066a34d6d949 SHA-256: 8393e1da7ed46d5b43eedf3ce6b5ce7b80811c03b97cac14268cd8130529e9cc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spamming operation. The ClamAV detection and ML classifier also indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external URLs points towards a malicious document designed to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://maypoin.ru/123?utm_term=verizon+router+g3100 PDF link annotation
    • http://shoop-fg.ru/jim_stoppani_shortcut_to_sizeqleq6.pdfIn PDF document text
    • https://tazesarazuf.weebly.com/uploads/1/3/4/7/134726557/liwosusaterakuxufel.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/ifChjgj/alien_shooter_game_online_free_download.pdfIn PDF document text
    • http://kupivse.xyz/super_smash_flash_4_unblockednamtv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384468/normal_6025b5009c05e.pdfIn PDF document text
    • https://cdn.sqhk.co/ripudilibizo/YTJhUkT/18575688169.pdfIn PDF document text
    • http://sipebep.22web.org/submit_form_without_ajax.pdfIn PDF document text
    • http://aycotoro5.xyz/men_s_apparel_mockup_templates_bundlegg8tt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kubafezin/bofuzesixupubu.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/introductory_steps_to_understanding_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/rinekubifibeniruxome.pdfIn PDF document text
    • http://luvenawow.epizy.com/business_communication_words_in_english.pdfIn PDF document text
    • http://damewanobojojo.rf.gd/skyrim_loot_manually_change_load_order.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/37907162882.pdfIn PDF document text
    • http://terofiwewu.rf.gd/how_to_rotate_guided_reading_groups.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_off0000eac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC1 4808 bytes
SHA-256: fad6acd1b06809fae2eec05b518526b32c56751a3c9d1befaab25c35d6f99d70
font_01_sfnt_off0000fb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4F 10536 bytes
SHA-256: f3b696fee79f5723dd2a0aec439c27de92a1107a7249c29c19b39a6af8579f7e

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