Malicious PDF — malware analysis report

Static analysis result for SHA-256 0650f0b111468e79…

MALICIOUS

PDF

72.7 KB Created: 2021-03-08 17:56:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0fe3dcf7041750973cb34d4653694ab7 SHA-1: 339b43ea38aeae9b1cd777b9858af56e099c62ed SHA-256: 0650f0b111468e790848dc9e4f4242960f2fd68fa0be0bda6aa673ee354b9320
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' point towards a campaign distributing malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/wix?keyword=system+of+3+equations+word+problems+worksheet PDF link annotation
    • https://bivolureru.weebly.com/uploads/1/3/4/5/134583024/sepasuzemoteda-wijukeboweper-wezogi-dupuwupej.pdfIn PDF document text
    • https://dapalijika.weebly.com/uploads/1/3/0/7/130738969/9872138.pdfIn PDF document text
    • https://gumagujex.weebly.com/uploads/1/3/5/3/135309175/3844367.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380691/normal_5ff57dfd4f112.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422371/normal_5febc1a8da978.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386829/normal_6008f23c412cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466657/normal_5fcc37ec789be.pdfIn PDF document text
    • https://gupinemarumilaw.weebly.com/uploads/1/3/4/0/134040787/935512.pdfIn PDF document text
    • https://nuruvubapifak.weebly.com/uploads/1/3/1/4/131452890/94964dd094.pdfIn PDF document text
    • http://nelitip.22web.org/kuzifogog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403951/normal_5fcdaae5051d7.pdfIn PDF document text
    • https://sifejolo.weebly.com/uploads/1/3/1/4/131410009/2121901.pdfIn PDF document text
    • https://jovogivodarula.weebly.com/uploads/1/3/5/3/135325070/kuwadigatigatetike.pdfIn PDF document text
    • https://nodopemewave.weebly.com/uploads/1/3/2/6/132682748/9058140.pdfIn PDF document text
    • http://tumojis.iblogger.org/social_media_marketing_3rd_edition_free.pdfIn PDF document text
    • https://kagopibuxewiki.weebly.com/uploads/1/3/1/3/131398156/pisekimujamo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sulalanetoki.epizy.com/45456552549.pdfIn PDF document text
    • http://vupabawamojot.rf.gd/nupuviluw.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/bomberman_world_rom.pdfIn PDF document text
    • http://renedutej.rf.gd/rizirexewuromototesegoz.pdfIn PDF document text
    • http://povalimokuwov.rf.gd/arcade_fire_the_suburbs_album_zip.pdfIn PDF document text
    • http://turixupifebut.epizy.com/bmct_terminal_berthing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/free_admin_templates_html5_css3.pdfIn PDF document text
    • http://porilebunenagu.rf.gd/informal_letter_format_spm_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/mon_bengali_song_mr_jatt.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_off0000dbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD5 6072 bytes
SHA-256: fcbd831588401d1e2c097ee09ce3ea48517fa43af7c7c3efd2ec615b7fc2a52d
font_01_sfnt_off0000f068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF068 10792 bytes
SHA-256: 508ec69b9c13be4eb80937239b989a7599813970cc8fe583e656b0046249a034

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