Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff8d7f1ababf33fd…

MALICIOUS

PDF

71.7 KB Created: 2021-03-30 15:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 61c126169ada435c63ca648ef7174bad SHA-1: 7b6afee47b230bc01e3eeebbab5584fbb406668d SHA-256: ff8d7f1ababf33fdd5b0c82ef76fdd18cbfc2c3a7b373aeef5404eb8281febe6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://jumiwimov.ru/wix?keyword=juegos+de+big+pixel+zombies PDF link annotation
    • http://lifelalulenomip.mygamesonline.org/professional_bodybuilding_workout_chart.pdfIn PDF document text
    • http://jizerigozigalav.getenjoyment.net/jopemofevafadotitukumu.pdfIn PDF document text
    • http://mawosatejojeka.sportsontheweb.net/vitara_brezza_accessories.pdfIn PDF document text
    • http://kovatafob.mypressonline.com/quadrafire_pellet_stove_insert_parts.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/nagav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_688f1a21efbd4f9399cbae698d024afd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfec9bc8-82b0-49a7-bdc6-c351738b5d78/the_hiding_place_book_cover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e04b401-a589-408b-ad99-bdbf45e39648/cuanto_es_100_gramos_de_harina_en_onzas.pdfIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_85ec6f7e5aba4462954c9f78a2b3c95a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/044ecff2-c025-45fa-8acc-7e8f356eac26/ar-15_sling_swivel_rivet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6704fd91-5ffb-4e51-9f1f-c465e53955c3/9159532229.pdfIn PDF document text
    • https://855e1e5b-0daf-4dce-aa73-dfad2bfec5df.filesusr.com/ugd/ced2dc_2e35c4e8436040ee95124bb4bd895df4.pdf?index=trueIn PDF document text
    • http://sijadogif.atwebpages.com/gewom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0523a799-7c91-4fd0-9e34-d90606dbae49/mooligai_maruthuvam_tamil_language.pdfIn PDF document text
    • https://c2963e02-5f2a-49ff-bb4d-22715b80ab3a.filesusr.com/ugd/55efe4_168110c5b38e44d690e6e5ba4b4dd21d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd3635b8-3900-48ae-aff6-026e6dcdd328/plantronics_backbeat_go_3_wont_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c1eb597-0ca6-4b40-a035-015bdfc96b61/88294564133.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_off0000cf36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF36 3016 bytes
SHA-256: cbb52481ce94e16f1aa7c1e5556943e0858c32639ae52c58d7d3596933ba349e
font_01_sfnt_off0000d9f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F2 5220 bytes
SHA-256: 50aadcc540e1e805164fccf366150aa294215f86cb05f58e4651a6b8e5f71350
font_02_sfnt_off0000eba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA7 11176 bytes
SHA-256: 43d0977c419b300b9d2b752101b923b3a9747e848d35cc563ee8f790412d8866

Open this report in the interactive analyzer, or submit your own file for analysis.