Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd8f18ebe05de8c…

MALICIOUS

PDF

73.9 KB Created: 2021-02-16 06:07:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: b37d068b4c3b8452ee83fcc359359749 SHA-1: 88d944c5dcee51658f1ad9244091367c43f46ccb SHA-256: 6cd8f18ebe05de8cf83e902cbd39792dd5934031dd45ea38d45897b969a3cd88
174 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to disposable domains or are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to phishing sites or download further malware. The presence of external URIs and suspicious link lures confirms the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://seumenha.ru/strik?utm_term=spay+and+neuter+near+me+cheap PDF link annotation
    • http://bokugezus.66ghz.com/powerpoint_presentation_template_2019.pdfIn PDF document text
    • https://giduzuzetedeze.weebly.com/uploads/1/3/4/8/134853145/jiruxoxijo.pdfIn PDF document text
    • http://aslixan.com/request_acknowledgement_email_templateq66fh.pdfIn PDF document text
    • http://securityofusersdevicesonline.site/sleeping_beauty_piano_sheet_music7t9d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426815/normal_5ff5aec63f7c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415739/normal_601bf98b7d95e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491725/normal_5fe1572d614e8.pdfIn PDF document text
    • http://bigpleasure.ru/pleomorphic_dermal_sarcoma_case_reportm7lji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450438/normal_600dc843d7dfa.pdfIn PDF document text
    • https://pebawatiwokup.weebly.com/uploads/1/3/4/5/134576243/572903b03.pdfIn PDF document text
    • https://feroraja.weebly.com/uploads/1/3/0/9/130969346/muxadeponikel_kivusew_varusavovuvunan_gilopapodubexog.pdfIn PDF document text
    • http://lagepukoz.22web.org/malaria_treatment_guidelines_2017_zambia.pdfIn PDF document text
    • https://mojoranazo.weebly.com/uploads/1/3/4/4/134403481/jixovifalu_fuviga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gureragiwoxoseg.epizy.com/poxapunogizirewori.pdfIn PDF document text
    • http://bolopanezodubun.rf.gd/candy_crush_friends_saga_mod_apk.pdfIn PDF document text
    • http://vokunewegulu.epizy.com/bada_bing_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/billi_akh_video_song_djpunjab.pdfIn PDF document text
    • http://buxazub.epizy.com/video_from_facebook_android_without_app.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/deadpool_1_tamil_dubbed_full_movie.pdfIn PDF document text
    • http://wigezenefibi.epizy.com/jowejagaf.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/casio_edifice_efr_550_dy_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/convert_to_word_acrobat_9_pro.pdfIn PDF document text
    • http://kabemetuva.rf.gd/gazidetaratojatobuwuv.pdfIn PDF document text
    • http://lamekukibudinos.epizy.com/28880160901.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_off0000e29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29E 5308 bytes
SHA-256: 90b686e4b63fb809004feb860231e24a6e349aca12fff6fa72368190f463cbae
font_01_sfnt_off0000f48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48C 10964 bytes
SHA-256: 46274dc8c2dfda76befb6b9178570f17081ffe75d33b2bbfe60399f6281f7154