Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb05fff1ef5268d1…

MALICIOUS

PDF

67.7 KB Created: 2021-03-22 01:41:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0414a0e437b60351ec9ad5e4f1387ed8 SHA-1: df1c9be6f59a69dafcebb5c5e2af9af332cb61d7 SHA-256: bb05fff1ef5268d131515ab5dcceab03c9733beefba5cd47413b71b47b3d57c6
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a large number of external PDF links. The ML classifier also strongly indicated maliciousness. The document appears to be a link farm designed to redirect users to potentially harmful websites, as evidenced by the numerous embedded URLs pointing to various domains.

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://dafemum.ru/wix?keyword=north+carolina+unpacked+standards+2nd+grade+math In PDF document text
    • https://cdn.sqhk.co/dibidoretu/eSnVuia/jepegazakefivafakulowika.pdfIn PDF document text
    • https://cdn.sqhk.co/kizofapekeku/hgagghd/koweduved.pdfIn PDF document text
    • https://cdn.sqhk.co/sunawopi/Ogcfiih/virtual_piano_free_download_for_windows_10.pdfIn PDF document text
    • http://solusaxisabo.scienceontheweb.net/aptitude_test_sample.pdfIn PDF document text
    • http://lishop.site/46814786092ttjlk.pdfIn PDF document text
    • http://spainwow.pro/46930258831piv6v.pdfIn PDF document text
    • http://regsen.website/metro_name_id_authentication_failed0ui7i.pdfIn PDF document text
    • http://medgaj.com/nematobusudonekofelozegf0aun.pdfIn PDF document text
    • http://dipunag.getenjoyment.net/99829481336.pdfIn PDF document text
    • https://bovejivisesuja.weebly.com/uploads/1/3/1/3/131384116/202294440.pdfIn PDF document text
    • https://cdn.sqhk.co/lewikokezina/hjFliin/wubokimagefugenabinegeso.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/OIMgcy1/past_future_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/iggUigR/bible_en_francais_louis_segond.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/icKijF1/muzegi.pdfIn PDF document text
    • https://tujulita.weebly.com/uploads/1/3/4/6/134687611/zenitegaxuwex_pewigur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muvamubas.atwebpages.com/53697235661.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/unstable_angina_guidelines_2016.pdfIn PDF document text
    • http://nowimirozox.atwebpages.com/gijugafaxuziso.pdfIn PDF document text
    • http://liduvitulugug.onlinewebshop.net/buy_oral_b_pro_5000.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/sufodurivipe.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_off0000c9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D4 5652 bytes
SHA-256: 384719a2a3f99ca708fd460897ac4e1b65c24b54f7638bac773ea49df486b560
font_01_sfnt_off0000dce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE9 10612 bytes
SHA-256: dc3f27615041d839ece6c0581650501f1466c428654fc5ea7b2b6673e2510acc

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