Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ffd007fcdee8807…

MALICIOUS

PDF

105.8 KB Created: 2021-03-19 21:14:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 47b44c85ca2c8563b6e218ac774caa82 SHA-1: c9be94015b7a4cda85f704dce1bf191f4971d9d5 SHA-256: 2ffd007fcdee8807de999dbd51e4482b106a8ed8010b183dd9102a1eaa1c9676
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing a large number of external links to disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing or trojan variant. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect users to potentially malicious websites, aligning with phishing or SEO manipulation tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://jacksth.ru/aws?utm_term=charlie+and+the+chocolate+factory+musical+show+duration PDF link annotation
    • http://vivekawiga.sportsontheweb.net/velineon_vxl-3s_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/tokokoxisuf/4XApGie/ropetesugetogolurakikep.pdfIn PDF document text
    • https://mazaxijav.weebly.com/uploads/1/3/4/4/134488449/5404458.pdfIn PDF document text
    • http://pewujok.mypressonline.com/ap_lang_argument_essay_examples_2019.pdfIn PDF document text
    • https://fukukajapojuj.weebly.com/uploads/1/3/2/8/132815924/juniwino.pdfIn PDF document text
    • https://mupezoki.weebly.com/uploads/1/3/0/7/130739180/giwijogulunaroduk.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/algorithms_robert_sedgewick_4th_edition.pdfIn PDF document text
    • https://lasasokuvob.weebly.com/uploads/1/3/1/6/131607269/nerapazul_xujovesij_wepudutubali_marigosa.pdfIn PDF document text
    • https://cdn.sqhk.co/fixuzigetir/dyplwie/linkedin_app_for_windows_7_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/PE8ggSK/jinukafu.pdfIn PDF document text
    • http://banuduxirodeb.mypressonline.com/anexo_iv_simples_nacional_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lajoxugulip.epizy.com/introduction_to_modern_cryptography_exercise_solutions.pdfIn PDF document text
    • http://duletufazipup.epizy.com/39374235661.pdfIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_6c895bd8213e484497436c2d961b6ec8.pdf?index=trueIn PDF document text
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_e1e8ffe3685b410ca782d7a5df9500e1.pdf?index=trueIn PDF document text
    • https://af431a04-9ebc-4ea4-a98d-45e4ffbfad14.filesusr.com/ugd/485053_59704c53e78c44bfb6eba7d6c59caf3c.pdf?index=trueIn PDF document text
    • http://lugivodunoxasi.atwebpages.com/xevonalufapuluvinarowo.pdfIn PDF document text
    • https://db7841a4-af10-4990-a2be-f084cd4acbf6.filesusr.com/ugd/e3c460_b2a1909359264981921be8832c5230ae.pdf?index=trueIn PDF document text
    • http://wapinogure.epizy.com/plastazote_foam_sheets_uk.pdfIn PDF document text
    • http://bobupeg.rf.gd/4747587875.pdfIn PDF document text
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_7803a218c0454678b391d7cec4e8a0b7.pdf?index=trueIn 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_off00015e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E09 5360 bytes
SHA-256: 370d0d05ea9ef6a4c1d4f5b0d1c18ebb63518f1020d58c17d3ebd99819c7a672
font_01_sfnt_off0001702c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1702C 12832 bytes
SHA-256: e3e012c9940f1f4ec8bb29253d4846dfbedbb28f2aa314c43ed01f814923262f