Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6086a5574129a5…

MALICIOUS

PDF

112.5 KB Created: 2021-04-03 22:15:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0f180743c6e2add639910fc90a563cde SHA-1: 5c34337d752aa137fd8f00f46260e7202c286c75 SHA-256: de6086a5574129a52893a325d7435f3d588558bcc8f8c35f6ffd2828905b6c53
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/award?keyword=emerald+tablets+of+thoth+complete+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483335/normal_605637d677f97.pdfIn PDF document text
    • http://elinekici.online/deposedozujarabularebudexsvrh.pdfIn PDF document text
    • https://cdn.sqhk.co/zapakolozu/gdgjnaK/cancan_music_sheet.pdfIn PDF document text
    • http://generalmassage.online/canon_ip2770_print_head_alignment_problemgk93a.pdfIn PDF document text
    • http://f13x.xyz/atomic_mass_number_and_isotopes_worksheet_answersu4mue.pdfIn PDF document text
    • https://wudumimimi.weebly.com/uploads/1/3/4/3/134356267/podawedediti.pdfIn PDF document text
    • https://cdn.sqhk.co/rozopebak/jaifjdY/sagevutawivotax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459028/normal_60304155b8aea.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/chocolate_black_and_tan_cream_red_miniature_dachshund_puppy_for_sale_nyc.pdfIn PDF document text
    • http://euromarket.pro/98182730942m9y59.pdfIn PDF document text
    • https://dudakodut.weebly.com/uploads/1/3/4/4/134497067/noxalokopowok-jebone-xenejox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426271/normal_60007a8248a51.pdfIn PDF document text
    • http://medtechnika1.ru/vujepalefonezekulojwwpgk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451970/normal_603abfd90c9c4.pdfIn PDF document text
    • http://vumogegotawugub.mypressonline.com/muwugoxelibiwawisodanoluf.pdfIn PDF document text
    • https://zesijijonade.weebly.com/uploads/1/3/0/7/130776416/falefesijulu.pdfIn PDF document text
    • https://cdn.sqhk.co/xewafazuk/jjhahhr/wingstop_locations_michigan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410695/normal_601f2196d5fb6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fbf8a1b-dc5e-4f2c-9218-f9bb8a600359/defuvekose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36fb4ea1-33ff-49a5-b6db-94d2944a3436/mares_puck_pro_manual_download.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000181b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x181B3 28640 bytes
SHA-256: 0fe3f37f3a032eca015575732c4598275d57ada219f2ebcbb11b3e2d72b84b02
font_00_sfnt_off0001412a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1412A 5492 bytes
SHA-256: 0a1a0f955cdbe946727fe323a6a21a5d9d9a10fcb0a66097717d6c1e4c70e7ea
font_01_sfnt_off000153a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153A0 15352 bytes
SHA-256: edd451bdef05c018d3607c80f37b02590b95acbdfa2203f8229bf346be46a3ec

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