Malicious PDF — malware analysis report

Static analysis result for SHA-256 d836dfa289a32894…

MALICIOUS

PDF

68.4 KB Created: 2021-02-17 21:49:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: f280e805d8cf66ca0035cf784ca1e89f SHA-1: 7cf494a5c5d4c68fc6ded9c321c0357f617e9e3d SHA-256: d836dfa289a32894d986d5d0d653d39f693a75eece46946f3f5f3c6f88b52a03
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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/shook?utm_term=caveman+adventure+apk PDF link annotation
    • https://fugebigejajifad.weebly.com/uploads/1/3/1/4/131406613/letojibuwir.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/hvac_troubleshooting_flowchartkdjbb.pdfIn PDF document text
    • https://tugixafebav.weebly.com/uploads/1/3/2/6/132681891/91a2a5d61b2.pdfIn PDF document text
    • https://rudiwiguxovo.weebly.com/uploads/1/3/5/3/135317070/pudeb.pdfIn PDF document text
    • https://digeforoxega.weebly.com/uploads/1/3/4/6/134668277/womuv.pdfIn PDF document text
    • https://vafiradas.weebly.com/uploads/1/3/3/9/133988778/zadajuduru_jesenaw_lagalen.pdfIn PDF document text
    • https://pebezudaxefen.weebly.com/uploads/1/3/4/3/134347708/d6155d23c47.pdfIn PDF document text
    • https://pufujodixig.weebly.com/uploads/1/3/1/4/131438007/sodosegelovej.pdfIn PDF document text
    • http://cosmostil.top/melody_attack_beat_and_rhythm_gamesyau15.pdfIn PDF document text
    • https://luzulobopado.weebly.com/uploads/1/3/2/6/132681737/fd419a2167.pdfIn PDF document text
    • http://geekcods.com/bride_and_groom_poses0dk14.pdfIn PDF document text
    • http://bezprovodov.guru/the_holy_quran_text_translation_and_commentary_by_abdullah_yusuf_ali2z62j.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/bigogowexidaremaba2zb4.pdfIn PDF document text
    • http://rocketdocs.us/beautiful_images_for_dp_in_hdmzp6a.pdfIn PDF document text
    • http://loginwithfb.site/slide_away_lyrics_oasis_chordsn4rph.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/posufij/ropim.pdfIn PDF document text
    • http://tunowik.epizy.com/barwon_water_annual_report_2016.pdfIn PDF document text
    • http://jiwepatifon.rf.gd/chinnari_mutta_movie_song.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_off0000d070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD070 4924 bytes
SHA-256: 5b146dd6d3759d8be26ca25fd344bba8fd1a7a81fe00b326db1d7df149076795
font_01_sfnt_off0000e11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11D 10420 bytes
SHA-256: e5c865a9d55e997a04f60e35c6324dd6c68bb534bf30b78cedfcb885796037f5