Malicious PDF — malware analysis report

Static analysis result for SHA-256 34843b61ef0b6bbd…

MALICIOUS

PDF

93.7 KB Created: 2021-03-21 04:29:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8502e7413f5de6e47c5a8f840f56f29b SHA-1: edcc0f8b4522930f82332c0c7a706921fbf90205 SHA-256: 34843b61ef0b6bbd0ef478972a6e22c3272d576fee31b941f1fb2f4660788f2f
126 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'Rug doctor deep carpet cleaner instructions' and embeds a URL pointing to a suspicious domain, vilenefex.ru. This domain is likely used to host a phishing page or distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or malware delivery attack pattern.

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 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://vilenefex.ru/wix?keyword=rug+doctor+deep+carpet+cleaner+instructions PDF link annotation
    • https://komamezumef.weebly.com/uploads/1/3/1/3/131398541/f10a4dc356b60.pdfIn PDF document text
    • https://sarogixi.weebly.com/uploads/1/3/0/8/130813770/d0ae3a9c05e2.pdfIn PDF document text
    • http://tujugataro.22web.org/titokiromixebakagir.pdfIn PDF document text
    • https://tivizaxif.weebly.com/uploads/1/3/1/3/131381605/2ee200f71468b1.pdfIn PDF document text
    • https://sawuwirepugasup.weebly.com/uploads/1/3/0/9/130969548/vimolakixuzas.pdfIn PDF document text
    • https://nenafefetu.weebly.com/uploads/1/3/1/4/131406263/505213.pdfIn PDF document text
    • http://intekzafast.online/asus_rog_crosshair_vii_hero_bios_update_without_cpu6rzg4.pdfIn PDF document text
    • https://xukusoresi.weebly.com/uploads/1/3/4/4/134488105/mesisuxufeb_vepur_garan_pulepukabi.pdfIn PDF document text
    • http://argo-tourism.com/how_to_start_craftsman_pressure_washer_2800_psi1rvfd.pdfIn PDF document text
    • https://pesefusuf.weebly.com/uploads/1/3/4/4/134486856/9588662.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/napoledunadigo/the_four_scott_galloway.pdfIn PDF document text
    • http://kulinikono.epizy.com/used_massey_ferguson_parts_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/sound_of_silence_piano_sheet_music_disturbed.pdfIn PDF document text
    • http://sajipesexadagon.epizy.com/emulator_pc_android_nougat.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/sorcerer_spells_5e_guide.pdfIn PDF document text
    • http://fisuzes.epizy.com/blowering_dam_fishing_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/89325727173.pdfIn PDF document text
    • http://duvufewitopemaw.rf.gd/19525909669.pdfIn PDF document text
    • http://jizabimumonox.rf.gd/7819704725.pdfIn PDF document text
    • http://vudasuluwiviwaj.rf.gd/porekudewufirigizebesebo.pdfIn PDF document text
    • http://xugivazule.rf.gd/dizisibexowuwujanakareme.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/sejitubolowotuxi.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_off000122ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AE 5128 bytes
SHA-256: 36dd176b1544d248093176691755f6c39979f545392a0c2cf3dcd4ce3246071b
font_01_sfnt_off0001342d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1342D 11380 bytes
SHA-256: 807dae229a3a6efe840ff3e550b133ced9fd13f0bdd527e3c88a4e380bc1a58c
font_02_sfnt_off00015ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AE4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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