Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b7f556a89f2a5c…

MALICIOUS

PDF

111.2 KB Created: 2021-03-23 04:12:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: fb74405c38c9a5d7c8344a254e10f61f SHA-1: d16c5e54cb6bb90c442a67a76140323b82aba6fd SHA-256: 65b7f556a89f2a5c4482457ab733428be1b81d99b079b0324c5e746d9e79f39b
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/aws?utm_term=howl+poem+annotated PDF link annotation
    • https://cdn.sqhk.co/jifigetuxu/gighidr/download_billion_builder_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/nilulugaj/5AhdHKO/zejajokatadaposobixanewim.pdfIn PDF document text
    • http://wupemokabate.scienceontheweb.net/famorojabovejik.pdfIn PDF document text
    • http://butumexumifene.iblogger.org/ms_excel_2013_free_download_for_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/igib74z/bedroom_furniture_sets_queen_white.pdfIn PDF document text
    • https://cdn.sqhk.co/gepabafi/hhbpjir/4557499003.pdfIn PDF document text
    • http://sejerodetupumil.medianewsonline.com/40886045752.pdfIn PDF document text
    • http://fegivate.medianewsonline.com/91683612425.pdfIn PDF document text
    • http://rexuxudal.22web.org/side_menu_bar_templates.pdfIn PDF document text
    • https://cdn.sqhk.co/xadakede/hhghjih/create_multiple_instagram_accounts_on_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/c905Tjb/stay_alive_reprise_hamilton_fanart.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
    • http://zarazemudaseri.epizy.com/alan_walker_fade_ncs_release_audio.pdfIn PDF document text
    • http://sajatuvireguta.atwebpages.com/rixuxaji.pdfIn PDF document text
    • http://refaruzevogot.epizy.com/cenchrus_biflorus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9baafaa2-6d57-49e0-98bd-ddaf5ab64ff0/how_to_use_mr_coffee_dehydrator.pdfIn PDF document text
    • http://sesugemedolaf.rf.gd/rezedapogoxapapes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49d92c45-294c-4396-b5ea-8582db8d2d7b/kufomete.pdfIn PDF document text
    • http://wedalavunobuwe.rf.gd/camera_scanner_to_online.pdfIn PDF document text
    • http://datidalumoz.rf.gd/breville_bambino_espresso_machine_manual.pdfIn PDF document text
    • http://resisimokopi.epizy.com/saltwater_pool_chlorinator_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e01e541-630e-4b85-84f8-3b114deb5801/balusid.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_off0001694f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1694F 4624 bytes
SHA-256: 4541c8db883417ab620da6d08724179f03d8a382538ace1c6813af1b1c9e0927
font_01_sfnt_off000178f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178F8 12508 bytes
SHA-256: 50a45d66db27e81761c58b9d7fd095a3bfd95e2109a9ce10c8174cb3f6856f7c
font_02_sfnt_off0001a1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1B6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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