Malicious PDF — malware analysis report

Static analysis result for SHA-256 886e3645a4dba8f8…

MALICIOUS

PDF

81.9 KB Created: 2021-05-11 02:34:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e06f5874598cfefd2397899c944b4186 SHA-1: 9810894371363d61966dc8cca0cf9e2e25706fd4 SHA-256: 886e3645a4dba8f8c27098fc500d3104a4bf0062c7ebeb10847c036912124a62
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the large number of extracted URLs suggest a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/strik?utm_term=tipos+de+archivos+para+video PDF link annotation
    • https://kadogejajufa.weebly.com/uploads/1/3/4/7/134717900/sulepu.pdfIn PDF document text
    • http://pikejofopon.mypressonline.com/cancer_papilar_de_tiroides.pdfIn PDF document text
    • http://ru-payment.casa/4693561428d2cyn.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/free_math_word_search_puzzles_printable.pdfIn PDF document text
    • http://cucoupon.info/17249027309o5isk.pdfIn PDF document text
    • https://jitotapo.weebly.com/uploads/1/3/5/3/135314003/mabano_pajafasaze.pdfIn PDF document text
    • http://woziwowariv.sportsontheweb.net/jurnal_cacing_tanah.pdfIn PDF document text
    • http://goxutasabadatum.sportsontheweb.net/23176608048.pdfIn PDF document text
    • http://melofuwi.getenjoyment.net/36665896937.pdfIn PDF document text
    • https://sufafiderek.weebly.com/uploads/1/3/0/8/130814754/vukija.pdfIn PDF document text
    • http://rebibedo.mywebcommunity.org/libem.pdfIn PDF document text
    • http://vinnipoh.space/what_are_the_elements_of_realismlgr3p.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://dozisozaxup.22web.org/manning_guide_sample.pdfIn PDF document text
    • http://lulizukudomiz.scienceontheweb.net/abstract_algebra_david_dummit_richard_foote.pdfIn PDF document text
    • http://jenuxijaf.mygamesonline.org/42155248034.pdfIn PDF document text
    • https://nugukijozagesek.weebly.com/uploads/1/3/0/7/130739433/8b0450d922a.pdfIn PDF document text
    • https://vagibize.weebly.com/uploads/1/3/4/6/134618654/7645a.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/xulikamul/armies_of_legionfall_reputation_guide.pdfIn PDF document text
    • http://diluzexeseki.rf.gd/engineering_company_profile_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/26_week_money_challenge_10_000.pdfIn PDF document text
    • http://dajovomofoziso.rf.gd/ielts_online_exam_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/nibulalavume.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_off0000fd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6D 5140 bytes
SHA-256: 479c101045bb4de052451f8c7e3884fb0a2298ba18734e1888d69873ff661f6b
font_01_sfnt_off00010ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE6 13428 bytes
SHA-256: a5613daa510bacb09a3c5611aca3e3d91b834b96b044d6df21298a9eb0dcb0ce

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