Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b0f4ba36243770…

MALICIOUS

PDF

85.2 KB Created: 2021-03-16 21:08:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c0b77165e93a5e87772921752817478b SHA-1: 9d1bd729c3a7e2623013b9ad3908d755797cb9d3 SHA-256: e0b0f4ba3624377087798a28007670f91ca6c3e7969daadd7772f3330d50c24d
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://seumenha.ru/strik?utm_term=dyson+dc39+vacuum+cleaner+review PDF link annotation
    • http://bumufirila.mygamesonline.org/14680279389.pdfIn PDF document text
    • https://ralutadepijug.weebly.com/uploads/1/3/5/3/135305627/16beb996.pdfIn PDF document text
    • https://xiwesawubofu.weebly.com/uploads/1/3/4/2/134265581/pozabej_tukeradesofim_kezeguxuwebet.pdfIn PDF document text
    • http://filanion.online/john_deere_48_inch_deck_bearing8aweq.pdfIn PDF document text
    • https://wubepifumemav.weebly.com/uploads/1/3/4/1/134109226/suxugudajux-xalok-xerarufolij-zujiviz.pdfIn PDF document text
    • http://cleaner360.shop/georgia_dnr_harvest_reportx93jp.pdfIn PDF document text
    • https://divozurov.weebly.com/uploads/1/3/1/4/131437474/9021274.pdfIn PDF document text
    • http://coupons2020.info/pijinaruxovofekesmccuu.pdfIn PDF document text
    • http://help-bluebadgecenter.com/microsoft_excel_2013_free_download_for_pcanbxg.pdfIn PDF document text
    • http://medicinfo.online/how_to_clean_the_glass_cooktop4hbqf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8546b567-499d-44cb-812b-f4cb210fa0cc.filesusr.com/ugd/1f0b74_7a62b1f3571b4e679b78aaa21646f583.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/amtico_adhesive_guide.pdfIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_092d314e14ca4721872f022cad4f7960.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/xawexobemikase.pdfIn PDF document text
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_08a324a9ab2f47169c62e227960a0e74.pdf?index=trueIn PDF document text
    • http://xawiwevivuzox.onlinewebshop.net/vishnu_sahasranamam_ka_hindi_mein_arth.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/5847225670.pdfIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_bafedfb9640f4a3d826fae5857dba470.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fekife/conceptual_physics_textbook_chapter_2_answers.pdfIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_0e70ab4857d54438aa2afecb7568def4.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_off00010e22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E22 5660 bytes
SHA-256: 242033b5a6282fd87dc5e95f3c66b525c4219aa638dd18263cb485d5adf30121
font_01_sfnt_off00012161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12161 11248 bytes
SHA-256: 8622fb38dd49e1b14da2293f9cfea94584253a5cefd85edaf3d89565476b808f

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