Malicious PDF — malware analysis report

Static analysis result for SHA-256 0111c7d6647c078a…

MALICIOUS

PDF

79.5 KB Created: 2021-02-06 04:07:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b6cd38f75724512cadbf146b4825574b SHA-1: adf8c6963cd460d4dfa19879d506929ba54528a6 SHA-256: 0111c7d6647c078a7973634cf1a4d8c98778582a46728bc51983bf4ecebf2740
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting services and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or trojan activity. The presence of external URIs and the overall structure suggest the document is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/123?utm_term=wolf+guy+manganelo PDF link annotation
    • https://cdn.sqhk.co/devisofage/ehbjiih/maximum_nasal_cannula_flow_rate.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/T11hihe/rexajirunizerewiruw.pdfIn PDF document text
    • http://sabofogetazo.22web.org/chrome_for_windows_server_2012.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/r2Qibln/commercial_ice_maker_for_sale_near_me.pdfIn PDF document text
    • http://naturalik.fun/this_girl_colleen_hoover_epubce6co.pdfIn PDF document text
    • https://malotote.weebly.com/uploads/1/3/4/8/134872882/nemoxajiwukagazibebi.pdfIn PDF document text
    • http://wifokilite.iblogger.org/49088478972.pdfIn PDF document text
    • https://vipogonegope.weebly.com/uploads/1/3/0/9/130969266/gozuzoxo-kitetefugoda-radalibof-fafasidivoto.pdfIn PDF document text
    • http://valezopifipob.22web.org/sagezi.pdfIn PDF document text
    • http://debugor.iblogger.org/thunderbird_international_business_review_author_guidelines.pdfIn PDF document text
    • https://gazodajatara.weebly.com/uploads/1/3/2/7/132712558/5753708.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
    • http://kelawezup.rf.gd/folazaxibopexupomogujix.pdfIn PDF document text
    • http://radagosedapisat.epizy.com/22244997925.pdfIn PDF document text
    • http://dabemekos.epizy.com/73459317883.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/pivevonilumuwiva.pdfIn PDF document text
    • http://fepapemifen.epizy.com/41728139766.pdfIn PDF document text
    • http://faperolakaf.rf.gd/bio_sample_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/80199818680.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_off0000ee79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE79 4680 bytes
SHA-256: 4e5ae82537280672fd390ab76f4c9987b12b9e1289b88608a762107564bb0d4a
font_01_sfnt_off0000fe68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE68 10732 bytes
SHA-256: 4d0bccb29a821f9316b403471d696206a0632fa7440c56feddffdb9a432abf1a
font_02_sfnt_off000122f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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