Malicious PDF — malware analysis report

Static analysis result for SHA-256 300d3f1cbf0e36c6…

MALICIOUS

PDF

75.8 KB Created: 2021-02-16 06:45:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f1af1c24cb04b0fbeaeadcfccd154d01 SHA-1: 49c06aab120f0b3404643392d9e6d68ddd746714 SHA-256: 300d3f1cbf0e36c6d172b9ec0f42986a80bcce36a5ba78ea2aa707f066d6241b
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links pointing to disposable domains, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier and ClamAV heuristic strongly indicate maliciousness, with ClamAV identifying it as Pdf.Phishing.Trojan. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful sites. The presence of a 'utm_term' parameter in one of the URLs further supports the idea of tracking or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/123?utm_term=does+graco+snuglock+work+with+click+connect PDF link annotation
    • http://pogadai.xyz/manual_chevrolet_aveo_lt_2011_espaolme6dq.pdfIn PDF document text
    • https://wubugijesagaro.weebly.com/uploads/1/3/1/4/131437106/wuxuf.pdfIn PDF document text
    • http://tuzudidoxofusi.22web.org/nosoxaludimibofanedugezun.pdfIn PDF document text
    • https://giretalude.weebly.com/uploads/1/3/4/6/134677333/salen-neruvobelirujon.pdfIn PDF document text
    • https://xawavefite.weebly.com/uploads/1/3/4/6/134667803/nedutuxaf_fazuzasimu_simopi_kegedufiguturi.pdfIn PDF document text
    • https://zoxamadafipezo.weebly.com/uploads/1/3/1/1/131164297/38cbb55ba4b.pdfIn PDF document text
    • http://ig-copyrightviolation.com/antivirus_gratis_android_20173ejkl.pdfIn PDF document text
    • https://padokerasuwo.weebly.com/uploads/1/3/5/3/135319223/5100578.pdfIn PDF document text
    • http://rugozuravonabib.22web.org/maxamolo.pdfIn PDF document text
    • https://tifomuzaki.weebly.com/uploads/1/3/1/1/131163977/1997550.pdfIn PDF document text
    • https://nogudoge.weebly.com/uploads/1/3/4/0/134017621/zotujuj.pdfIn PDF document text
    • https://kavosimodo.weebly.com/uploads/1/3/4/9/134901779/45233.pdfIn PDF document text
    • https://nalabusapigo.weebly.com/uploads/1/3/2/7/132740218/vetul.pdfIn PDF document text
    • http://raifaisentgo.online/chinko_ekun_able_god_video_free2gh6n.pdfIn PDF document text
    • http://bizbize-yeteriz.org/simple_family_budget_templatem3olt.pdfIn PDF document text
    • http://openchambre.xyz/binding_of_isaac_item_unlock_guide0tdgi.pdfIn PDF document text
    • http://originalhallyu.com/arctic_silver_5_guidetoo9i.pdfIn PDF document text
    • https://witabavuwimob.weebly.com/uploads/1/3/4/3/134339013/lazoraju.pdfIn PDF document text
    • http://nakanilo.club/secret_language_of_birthdaystenos.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/datarofapakil/camelot_season_1_episode_1.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_off0000eb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3C 5216 bytes
SHA-256: 6369359d437ad738b0620082a0f4faea9838e8869d1ae889c094fa3d0f808621
font_01_sfnt_off0000fd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD12 10804 bytes
SHA-256: 3f6777afac70f5cffc153f503187a7c88456bb806e86b61845706bbb3ed76b08

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