Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6cb89759ba2eae…

MALICIOUS

PDF

88.4 KB Created: 2021-05-11 14:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 80a6fdc2622924ca90e4a2de69ff24f9 SHA-1: 2205808cc42001bf65e1a0032a15535e00236dfc SHA-256: eb6cb89759ba2eaec947e03fc15ac775cc24636b491e9a4199fa02117a776d30
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to deliver phishing lures or redirect to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://vilenefex.ru/strik?utm_term=dragon+age+origins+romance+guide+alistair PDF link annotation
    • http://fafabil.getenjoyment.net/10321570618.pdfIn PDF document text
    • https://cdn.sqhk.co/lewoxiguj/etifjeK/marshmello_happier_feat._bastille_lyrics.pdfIn PDF document text
    • http://milukiwidawedej.22web.org/61715427276.pdfIn PDF document text
    • http://palitra-cveta.ru/comcast_dvr_box_stuck_on_boot1thhf.pdfIn PDF document text
    • http://about-fb-support.com/rc_hibbeler_fluid_mechanics_solutionoy4cj.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/bagh_bhatt_ayurveda_books_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/qifjbjj/6980427522.pdfIn PDF document text
    • http://therarbooks.com/50142922434m9tti.pdfIn PDF document text
    • http://tonivatibiri.22web.org/rogokarejutakumejed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408997/normal_5fedf0d4439ab.pdfIn PDF document text
    • https://cdn.sqhk.co/niripakexad/jhhhshe/silver_dollar_city_christmas_lights_video.pdfIn PDF document text
    • http://socialwave.me/506721520541709n.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/jci6ibG/freeciv_for_mac.pdfIn PDF document text
    • http://whalesqpa.fun/calculations_using_significant_figures_worksheety1wo0.pdfIn PDF document text
    • https://cdn.sqhk.co/nesuxozajek/cRkhe49/66879504907.pdfIn PDF document text
    • http://bafedudovodamo.medianewsonline.com/what_is_sisterhood_to_you.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445555/normal_603d5721da282.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/lowebemuwojiso/arthropods_test_worksheet.pdfIn PDF document text
    • http://gonegexunu.myartsonline.com/what_books_were_removed_from_the_bible_in_1684.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/please_find_attached_the_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/25147001798.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/dont_quit_poem_author.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2D 5140 bytes
SHA-256: 916fd410ba36c1550db6b75dd6785b296508001da873ecb6d29de545ef4be1cd
font_01_sfnt_off00010b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8A 10692 bytes
SHA-256: 6cce6ac17502238880aed5264d229341a1930cc7d34dbdaa8c792a251d2c268b
font_02_sfnt_off00013069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13069 16160 bytes
SHA-256: 4509184d4256d78ba10130567a0dcad6cd5a1287a22d1100354fc8b69208edca
font_03_sfnt_off0001457e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1457E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f