Malicious PDF — malware analysis report

Static analysis result for SHA-256 176738b8269ea4b1…

MALICIOUS

PDF

65.7 KB Created: 2020-12-16 23:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1aa7eb5eaf1e964c6eb4bd8b8cd6a2e4 SHA-1: b646fdbc3d894815c2def3f928db8afb460926ef SHA-256: 176738b8269ea4b1e49d47c1ad7f46ad865d5701381a153059f8ae3fd62ce20d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, 'https://traffking.ru/123?utm_term=vocab+level+e+unit+5+test+answers', is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'Vocab level e unit 5 test answers', aligning with a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/123?utm_term=vocab+level+e+unit+5+test+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375518/normal_5f991082997ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375521/normal_5fc9c3a87d789.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5982e085bf90c0e1d0cdd/t/5fd089c9fc93c51d16e0bc23/1607502292443/free_bollywood_movies_watch_online_without_downloading.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/ontology_and_epistemology_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/43391961374.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/31678425212.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/3144537746.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4dfad403f5353fdaf152a/t/5fccfc4fc836a917f90f5275/1607269456989/stock_market_images_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/95255302383.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/halide_edip_advar_ateten_gmlek.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfdad3ca23154c95b9bd6/1606221231231/walmart_steam_gift_card_not_working.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fced8af71f6413cf5417950/t/5fd09005ab2d482295e12c7f/1607503878815/electronic_probe_tester.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0467d65-61d9-4480-ad77-4fc1c24ad34c/tin_phng_iu_ting_anh_l_g.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_off0000c583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC583 5172 bytes
SHA-256: dd1411528dd8d7fdde496f67f1f43bc84b00584b7f26c492a7574cb8e22d77fd
font_01_sfnt_off0000d747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD747 10984 bytes
SHA-256: 025edf89978eb05c4239f12a8e8ed71702e9bb850859c406fc9e9fbb8f231198

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