Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b864fdd570b2c48…

MALICIOUS

PDF

79.3 KB Created: 2021-03-25 04:01:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9c7cbd8895b393501b85e28e92fdab0d SHA-1: e7db6d2801b40ff1c9144163b73558c4391fd5d5 SHA-256: 0b864fdd570b2c4849a78644d35422a0fbb047124b59016005bbf12b9e024fa5
134 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, and is flagged as a link farm. The presence of a 'download button' heuristic combined with the ML classifier and ClamAV detection strongly suggests malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/123?utm_term=canon+canoscan+lide+210+user+manual PDF link annotation
    • https://pobizaxorede.weebly.com/uploads/1/3/2/6/132696020/fusanafita.pdfIn PDF document text
    • http://bu-markett.com/bapojunetukamapogilhje0.pdfIn PDF document text
    • https://lefizedut.weebly.com/uploads/1/3/2/6/132681647/xikopud.pdfIn PDF document text
    • http://peteferix.mypressonline.com/abnormal_psychology_an_integrative_approach_7th_edition_free.pdfIn PDF document text
    • https://kosemezaped.weebly.com/uploads/1/3/4/7/134711049/6202987.pdfIn PDF document text
    • http://vquest.website/87485192056z95eu.pdfIn PDF document text
    • http://save50it.pro/how_to_repair_a_lawn_mower_cableeppyn.pdfIn PDF document text
    • http://brumbum2.xyz/53567500404hzxie.pdfIn PDF document text
    • http://jusojixanona.getenjoyment.net/where_to_buy_frigidaire_parts_in_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/wejideduv/aBJXZGX/acrylic_nail_designs_blue_and_pink.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/gsd3gjo/ocoee_weather_tn.pdfIn PDF document text
    • http://reveruverof.medianewsonline.com/48816513812.pdfIn PDF document text
    • https://woxoxuwavi.weebly.com/uploads/1/3/4/6/134689382/dazavawo_dorapuf_derigesano_volefitamif.pdfIn PDF document text
    • http://gipovasota.sportsontheweb.net/34045167689.pdfIn PDF document text
    • http://ropejolun.iblogger.org/obsessed_movie_fzmovies.pdfIn PDF document text
    • https://cdn.sqhk.co/satasevubu/hroeAS5/juventus_best_players_2015.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimanujage/jaticjb/vabekoxavobomopegufaxotes.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/jd2hghe/guide_for_among_us_walkthrough_episode_5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/husqvarna_55_rancher_carb_adjustment.pdfIn PDF document text
    • http://dozudaz.epizy.com/tutilikatoral.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/android_change_app_background_color_java.pdfIn PDF document text
    • http://wuzuferopo.epizy.com/sunbeam_heated_mattress_pad_king_f2_error.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_off0000f66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66E 5316 bytes
SHA-256: 2c98cfa00fe2539c5ba1d77a5234c30de3918b8fbca9e175c54df2f46aab42a6
font_01_sfnt_off00010863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10863 12096 bytes
SHA-256: 9dc99cae7d507f266ba1b0b0d21c4ffd6b776bccbc6747de2f112085bf5f1026

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