Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a84466fac6b2d6c…

MALICIOUS

PDF

86.4 KB Created: 2021-03-30 23:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ecc3c17d156ca7245ebc6993ffaa3193 SHA-1: d1b9c278c14a1ee67a64fc52b10d97d3b536feca SHA-256: 4a84466fac6b2d6c4a3b6cbb544010c2a337b75dd62ab5de536dcf0651074569
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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=bollywood+mkv+videos+free PDF link annotation
    • https://binimejo.weebly.com/uploads/1/3/4/6/134665204/40f681fc55de4.pdfIn PDF document text
    • https://serudifatu.weebly.com/uploads/1/3/5/3/135324897/kedonavudafas.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/arsenic_and_old_lace_full_play_script.pdfIn PDF document text
    • https://nugilura.weebly.com/uploads/1/3/5/3/135317706/nokixix.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/ijhiihj/rts_expansion_panel.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/b9996ae9.pdfIn PDF document text
    • http://leporabev.mywebcommunity.org/insuficiencia_utero_placentaria.pdfIn PDF document text
    • http://bazunujovi.scienceontheweb.net/69540970360.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/e3hdBb7/radioactive_decay_calculator.pdfIn PDF document text
    • https://verakolor.weebly.com/uploads/1/3/1/3/131379730/zidodonatad.pdfIn PDF document text
    • https://cdn.sqhk.co/lajawawinu/Djfidew/valasajopa.pdfIn PDF document text
    • https://cdn.sqhk.co/ramazunor/hfgig2V/mutulikupiridupewis.pdfIn PDF document text
    • http://vujofinupapido.22web.org/jowudifinotapim.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/jgphjaF/adventure_academy_promo_code_entry.pdfIn PDF document text
    • http://xidasetetobuge.scienceontheweb.net/46921438767.pdfIn PDF document text
    • https://cdn.sqhk.co/migefareg/Ejehhij/fish_live_wallpaper_hd_download.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/gekojulog/42307537203.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/aquaman_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/namokoboge.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/toxonedodifit.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/xarowagadagirigefiva.pdfIn PDF document text
    • http://mudotepejix.epizy.com/84442238988.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10988 4812 bytes
SHA-256: 27d5b63abe5f98b69e0077dcb5547bc412139a1eb2f66aa776a5bc4855ebf9a2
font_01_sfnt_off000119fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FD 10508 bytes
SHA-256: 4f7aebf55dcfc293cffcc00d47acaa80f6f06630798651d1d6bb22be12c556ce
font_02_sfnt_off00013dc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DC2 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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