Malicious PDF — malware analysis report

Static analysis result for SHA-256 01230ab3dbb1fb41…

MALICIOUS

PDF

75.8 KB Created: 2021-02-16 17:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c45bf0de00d66a8b19b2a3a55a8716c2 SHA-1: 21c40c305697839e076c8fad030431e2d084cdb7 SHA-256: 01230ab3dbb1fb416466af8a33082db60f58285263aa6ed56755a48efb57ac40
244 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to various external sites, some of which are identified as malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the extensive use of external links suggests an attempt to lure the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=hush+hush+becca+fitzpatrick+book+review In PDF document text
    • https://tedawubav.weebly.com/uploads/1/3/4/3/134376018/bulofusutagevo_xejal_mogabekope_gosafadijugi.pdfIn PDF document text
    • http://tozufokoxogo.22web.org/chennai_express_video_songs_mp4_hd.pdfIn PDF document text
    • https://toxujubew.weebly.com/uploads/1/3/1/4/131437446/gulazivanaza-geketa-remerizonema.pdfIn PDF document text
    • http://pakavoposot.22web.org/kalozimojupakipopiwime.pdfIn PDF document text
    • https://movabeze.weebly.com/uploads/1/3/0/8/130814110/jezetazalexi_zupurowivuge_jedigabenibil.pdfIn PDF document text
    • http://ita-bio.fun/5277851287pycz1.pdfIn PDF document text
    • https://wejilosadala.weebly.com/uploads/1/3/0/8/130815097/7782853.pdfIn PDF document text
    • http://lexusesadedebaz.22web.org/oval_bassinet_sheets_walmart.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/reriwurine_gimutapov.pdfIn PDF document text
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/jidikolaga.pdfIn PDF document text
    • https://bojijoda.weebly.com/uploads/1/3/5/3/135325587/3179275.pdfIn PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/38a6a3d650a81a0.pdfIn PDF document text
    • https://xasukibumit.weebly.com/uploads/1/3/4/7/134749231/6814326b0d528c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xilibosukotijob.epizy.com/botany_notes_for_upsc.pdfIn PDF document text
    • http://pamixawikisif.epizy.com/uniformes_bachillerato_alexander_bain.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_off0000eb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2F 5440 bytes
SHA-256: 2f0686cf290b3474545d42d45d47c0ebca5ead20fbd123a1674702e8a15ce736
font_01_sfnt_off0000fdc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC5 10588 bytes
SHA-256: b994b2b8915d0e45d434709f4cf3c2ae2e77bf880acee63a49b8ed81a45fcdc6

Open this report in the interactive analyzer, or submit your own file for analysis.