Malicious PDF — malware analysis report

Static analysis result for SHA-256 35247ddcca873ff7…

MALICIOUS

PDF

72.8 KB Created: 2021-01-27 16:47:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: add73040e25f4e50d8ebfaddca2f29c1 SHA-1: f6b72d33269ae0eee13b95b0f18acb9ba205e559 SHA-256: 35247ddcca873ff789eae04d090880c9ee9c6a332d1d29417cdb442dcf7fe131
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It functions as a link farm, containing numerous external URLs pointing to disposable hosting services, likely intended to distribute further malicious content or phish users. The presence of embedded URLs and the overall structure strongly suggest a malicious intent to redirect users to potentially harmful sites.

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://baarspo.ru/wb?keyword=smart%20recharge%2049%20airtel PDF link annotation
    • https://nodeseverew.weebly.com/uploads/1/3/5/3/135323512/kovifid.pdfIn PDF document text
    • https://jefiwosu.weebly.com/uploads/1/3/1/3/131379536/nenozekupifot.pdfIn PDF document text
    • https://wisejagu.weebly.com/uploads/1/3/4/8/134881465/kanejozip-juxipazeva-lumunuvopesuzo.pdfIn PDF document text
    • https://cdn.sqhk.co/xonudutixova/fmcicmb/best_chocolate_brownie_recipe_guardian.pdfIn PDF document text
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/aed258b0477.pdfIn PDF document text
    • https://latitatuforuza.weebly.com/uploads/1/3/1/3/131398212/xupug-karivuwi-zovividirixas-folefuwesajed.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/469275.pdfIn PDF document text
    • http://wutomomar.22web.org/adblock_for_macbook_pro.pdfIn PDF document text
    • https://tekoboxini.weebly.com/uploads/1/3/0/8/130814877/2555538.pdfIn PDF document text
    • https://tuxakosubulep.weebly.com/uploads/1/3/4/0/134012578/eaf8019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481509/normal_5fcd52d753c20.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/aGEWij5/43793405680.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/hibjifz/sepufedebugod.pdfIn PDF document text
    • https://majejuwusi.weebly.com/uploads/1/3/2/3/132303270/roxawufibopu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417405/normal_5fe157bdb2fb7.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/ijYjagd/vi_editor_append_to_end_of_line.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tufuripisaren.epizy.com/fishing_guides_in_everglades_city.pdfIn PDF document text
    • http://vavubal.epizy.com/33583672849.pdfIn PDF document text
    • http://sunuwib.epizy.com/88147109664.pdfIn PDF document text
    • http://madujenorenugax.epizy.com/31865699881.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_off0000e077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE077 5380 bytes
SHA-256: 564f010d43ad614860a2235eb8c46e691bcaa764fc536e2c64b70a9330bc4bca
font_01_sfnt_off0000f299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF299 10396 bytes
SHA-256: ee091d22ee571ad290da006e574557b622d1bd69bba37d33016de6d0449a936e

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