Malicious PDF — malware analysis report

Static analysis result for SHA-256 9609fe86a8765494…

MALICIOUS

PDF

74.5 KB Created: 2021-04-01 16:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c1664f8a1c3bc6fe25b69726c4cbc090 SHA-1: e7a0d51112364b2148e554635d743940e03344a2 SHA-256: 9609fe86a8765494293c83159fcb7b308b122353096f5cbc2bbb9331d1aa7bcd
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, suggests a lure related to insurance authorization forms. The presence of numerous links on disposable hosting further supports a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/123?utm_term=bcbs+ppo+michigan+prior+authorization+form In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384644/normal_602ca66904c66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_6031f887e23c1.pdfIn PDF document text
    • http://bamiluzigu.mygamesonline.org/roxavoxalofuzugofot.pdfIn PDF document text
    • http://goodsfor.life/popevonametapeug4v.pdfIn PDF document text
    • http://revershjtb.site/boduwulkqagw.pdfIn PDF document text
    • http://lenorimageb.iblogger.org/ropitigamizubut.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/remove_white_background_from_online.pdfIn PDF document text
    • http://vebuwovivulab.mygamesonline.org/gekokomelu.pdfIn PDF document text
    • http://takovod.66ghz.com/beatles_all_songs_lyrics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406812/normal_60304c634193d.pdfIn PDF document text
    • http://zikifogomi.22web.org/surimojutozisokamimujeze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478946/normal_60085e9edccff.pdfIn PDF document text
    • http://dejepuzalew.mygamesonline.org/pupixinoba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/72b7e131-5046-4703-8fc5-93077983121a/what_is_tanya_in_judaism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a40cdab9-4557-47d6-9f02-e5e2f3303414/where_to_sew_badges_on_scout_uniform.pdfIn PDF document text
    • http://sifuxugod.epizy.com/netbeans_java_gui_builder_tutorial.pdfIn PDF document text
    • http://bekusisit.atwebpages.com/fabedokuwegedimub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d3cf483-7db9-4a34-b0e2-718656d36188/kali_linux_revealed_pdf_ita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a88cf06-5b04-44a2-962e-d95c8a0ce71b/48413798816.pdfIn PDF document text
    • http://dezologukow.rf.gd/journal_of_time_series_analysis.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_off0000e4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D8 5636 bytes
SHA-256: c88a9f99e97f5438a17b4b51acd1eb1876ba123b7350779508e44b09d063eefd
font_01_sfnt_off0000f7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E4 10784 bytes
SHA-256: ef3d20277463558f9e6c12dd4ef8975a291de000339567bd8b0f1c9e254f93bd

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