Malicious PDF — malware analysis report

Static analysis result for SHA-256 75016ccfc048166e…

MALICIOUS

PDF

83.5 KB Created: 2021-03-21 23:46:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f55c4f74b0fbc5e0ba55bd81f0ee4c2e SHA-1: 21ab74f52f6be2e22b5b401247c75a512a779c41 SHA-256: 75016ccfc048166ed0c38da5ec522c565934908843473ea99c2a0af1b8a8cb6e
186 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 0.9954

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://bologen.ru/wix?keyword=game+of+thrones+conquest+cheats+2019 PDF link annotation
    • https://wekegakusujesal.weebly.com/uploads/1/3/4/2/134266445/1cc9828e0516.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/jejecPM/forklift_daily_checklist_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420907/normal_5ff7768742f1a.pdfIn PDF document text
    • https://surogupidaxa.weebly.com/uploads/1/3/4/9/134901722/f0189378e90dc.pdfIn PDF document text
    • http://tezoxefakalexo.sportsontheweb.net/how_to_clean_dirt_devil_power_max_filter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_603918b82ab07.pdfIn PDF document text
    • https://tewagolefavir.weebly.com/uploads/1/3/0/8/130814187/bobopebuzovixe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413703/normal_6025e5045a62a.pdfIn PDF document text
    • https://guzagotoxi.weebly.com/uploads/1/3/5/3/135313280/0fe1e7c583ea.pdfIn PDF document text
    • https://dalenorilesa.weebly.com/uploads/1/3/4/8/134858788/nupojume_kuzoruw.pdfIn PDF document text
    • https://cdn.sqhk.co/mifodirula/gfIJ8jj/camera_gopro_hero_3_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449622/normal_6002a0adf3a90.pdfIn PDF document text
    • https://namoturobiro.weebly.com/uploads/1/3/0/7/130739164/3146296.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/51X0fss/puzzle_dragons_anime_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/gatavazer/xYKgcYO/lozuvagodugazegufi.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/ggc3gd7/pinonarukatix.pdfIn PDF document text
    • https://newogevalofa.weebly.com/uploads/1/3/4/8/134898908/viwekesiroje_munuzupaputidi.pdfIn PDF document text
    • http://palubofapejuraw.mywebcommunity.org/indian_instant_pot_cookbook_free_download.pdfIn PDF document text
    • https://pagevexositikul.weebly.com/uploads/1/3/5/3/135327712/mofemufevib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413848/normal_603e07ebe1b64.pdfIn PDF document text
    • http://vuvodagedene.scienceontheweb.net/84663123126.pdfIn PDF document text
    • http://vogudikomi.getenjoyment.net/do_walmart_cashiers_get_drug_tested.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://12dd324c-696b-4d67-8c19-991f3eacec2c.filesusr.com/ugd/eeb7bd_9a3d30717ef34c9493cf98b42dc89342.pdf?index=trueIn PDF document text
    • http://lufevexos.atwebpages.com/the_copyeditors_handbook_and_workbook.pdfIn PDF document text
    • https://5f384421-c3d0-4b4c-85a6-d3745974446f.filesusr.com/ugd/40006b_ae9931a121514da1be849088fc4cd59d.pdf?index=trueIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_d9ef5b9924a446fa8e07bb8b8da4b1e7.pdf?index=trueIn 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_off0000f922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF922 5564 bytes
SHA-256: 098f9f076b5a994c7b565b691939b944dcf307661f60145f128eddbe3b94df74
font_01_sfnt_off00010bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEA 11104 bytes
SHA-256: 25af4792e72d18462e7c47d31f5dd3093911fbdfa9525e3c32e321b106c9180b
font_02_sfnt_off000131be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131BE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176