Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcfe9ee9a4b23fd4…

MALICIOUS

PDF

81.5 KB Created: 2021-02-17 05:15:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0c0116c6830320d3d1cee8c2d227bf59 SHA-1: ee583ba296208350db79a718ff12d79d3b0e1056 SHA-256: bcfe9ee9a4b23fd4e6b8b21bd22cde297e2c01e5ef7daf29482e0ab208ce4013
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to creating a Christmas tree, likely a lure. The presence of multiple disposable hosting links and a high ML classifier score further support its malicious nature. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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://crophysi.ru/aws?utm_term=how+to+create+a+beautiful+christmas+tree In PDF document text
    • https://cdn.sqhk.co/zarejesorufo/ihh9Xji/premier_league_adrenalyn_xl_2020_21_tin.pdfIn PDF document text
    • http://tehnikator.ru/risuzakafebavubotu3pmla.pdfIn PDF document text
    • https://cdn.sqhk.co/nukunudakiju/5hhIjbF/wifituzokaxirimenifajal.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/gc6Bhdl/narevusuvu.pdfIn PDF document text
    • https://rujizubag.weebly.com/uploads/1/3/0/7/130776042/romos.pdfIn PDF document text
    • http://xonibiz.22web.org/dukimajininalur.pdfIn PDF document text
    • http://xevamaz.iblogger.org/barbie_doll_couple_images.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/dimajijebisqjylo.pdfIn PDF document text
    • https://cdn.sqhk.co/jidobimatu/giZgjbC/27938015075.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/property_investment_strategy_template.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/alcatel_lucent_manual_8018.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/49971610981.pdfIn PDF document text
    • http://sinalowus.epizy.com/27583041458.pdfIn PDF document text
    • http://notaruk.rf.gd/93683340669.pdfIn PDF document text
    • http://lakelasu.rf.gd/xesikapujanef.pdfIn PDF document text
    • http://moxododokojuke.epizy.com/literature_circle_role_sheets_high_school.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_off000102e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E7 5316 bytes
SHA-256: dfef3a07315ff8e1e0ee4cc59350ddf42681c55a1d65220934bd0c1b5678cd5d
font_01_sfnt_off000114dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DC 10648 bytes
SHA-256: fb8b033275580dc5140d8a587e0ffd1b90cdc468cf87e40312435220c8a79125

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