Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c84147804f606f…

MALICIOUS

PDF

93.5 KB Created: 2021-03-29 07:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: aca34516847e5081174878257044f348 SHA-1: d89daeb4d411bc7ea5171e1b01d558e5a6c5ab6b SHA-256: c4c84147804f606f0a249975d2234dcb10821ba1565c004e10de4f9e9fa31a9f
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to host malicious content or redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • 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://jumiwimov.ru/award?keyword=addition+and+subtraction+of+polynomials+worksheet+for+grade+7+pdf PDF link annotation
    • https://bifugojatomawak.weebly.com/uploads/1/3/1/4/131437093/413617.pdfIn PDF document text
    • https://nekemobo.weebly.com/uploads/1/3/5/3/135323096/firuwajuzolo-xopuwukodezi.pdfIn PDF document text
    • https://xaforegitada.weebly.com/uploads/1/3/1/4/131413040/vimafibas_xoxonuwipu_jenerod.pdfIn PDF document text
    • https://pisixaxonazav.weebly.com/uploads/1/3/5/3/135394173/934668.pdfIn PDF document text
    • http://kegujusotuk.iblogger.org/sagoxik.pdfIn PDF document text
    • https://jetukuzimol.weebly.com/uploads/1/3/2/6/132695660/2aba218e8572.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1fd079ea-3156-4ae8-a0b4-6153e0b529c5.filesusr.com/ugd/e66bf7_258f2a716b684729a57e81efce30091f.pdf?index=trueIn PDF document text
    • http://rajamuviw.epizy.com/88644508966.pdfIn PDF document text
    • https://5a11eff3-0c7a-45dd-bb89-060d4d4d2060.filesusr.com/ugd/72216b_28f71cf3e60546c6a73a0a3785e15ca7.pdf?index=trueIn PDF document text
    • https://034618a9-9b39-4f41-ad18-95bca1d1c80b.filesusr.com/ugd/48d9a1_01a1a1151d0d4a6394ac6bfc0d9b4d63.pdf?index=trueIn PDF document text
    • http://muweluboxakok.rf.gd/42480907760.pdfIn PDF document text
    • http://fasevirova.rf.gd/jopubavubulepilu.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/latest_blouse_designs_2018.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/79423607338.pdfIn PDF document text
    • http://lujotuxubegu.rf.gd/sat_test_prep_book_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/gotesoxazijasatasim.pdfIn PDF document text
    • http://tezadoni.rf.gd/box_and_whisker_plot_worksheet_with_answers.pdfIn PDF document text
    • http://mokineso.epizy.com/53612713381.pdfIn PDF document text
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_e404cb2ebee3460c8fe6aff42b39b8b6.pdf?index=trueIn PDF document text
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_18697ca7c84b4bcfa26817e91a1ff41d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vutame/why_is_twilight_not_on_prime.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/angular_admin_template_open_source.pdfIn PDF document text
    • http://vekisofekibote.myartsonline.com/amplificador_fender_princeton_chorus_2x10.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/90868335568.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11370 6036 bytes
SHA-256: 77684b6f12d6c2ff454e8f73b7d27625558f078e09f194e98eb06f23f6134887
font_01_sfnt_off000127f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F6 11712 bytes
SHA-256: ce0d4d8283ce7939e822dab5a582a67ccaefe2ac6162242e5a1170f3ffae2669
font_02_sfnt_off00014ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FF8 16388 bytes
SHA-256: ca62f7e7ad333ba80d2afd7eda279ef03e8838e4113971b27c1d8bd0b175e996

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