Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcc7fd7c41df09d0…

MALICIOUS

PDF

68.5 KB Created: 2021-02-21 01:48:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5f8d158f60e88034d5450cdd73ee2871 SHA-1: 228cb1aca1c605ce20575501289a3746f351cf72 SHA-256: dcc7fd7c41df09d064134fc91a7c38a81ad4c8179681312a17fdef05415ac45f
206 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external PDF files hosted on disposable domains, likely for phishing or scam purposes. The 'SE_CALLBACK_LURE' heuristic further suggests a callback phishing or tech-support scam pattern, aiming to trick users into contacting malicious actors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://maypoin.ru/strik?utm_term=fix+cracked+heat+exchanger+furnace PDF link annotation
    • https://fapusogemewesil.weebly.com/uploads/1/3/2/3/132302858/gegadimolet_gamigeveko_feritinapegumi.pdfIn PDF document text
    • https://gavizixuf.weebly.com/uploads/1/3/5/3/135334805/5903122.pdfIn PDF document text
    • https://subamepowesita.weebly.com/uploads/1/3/4/8/134875458/4276102.pdfIn PDF document text
    • http://jeratojovu.66ghz.com/zawemorixixogunalasudike.pdfIn PDF document text
    • https://jawutasujo.weebly.com/uploads/1/3/0/9/130969833/tibavonemowenilimimi.pdfIn PDF document text
    • http://xusonawifofi.iblogger.org/create_org_chart_google_sheets.pdfIn PDF document text
    • https://wurewoji.weebly.com/uploads/1/3/1/4/131438788/1c53d8.pdfIn PDF document text
    • https://jevijoju.weebly.com/uploads/1/3/5/9/135978445/b4c6621fd59.pdfIn PDF document text
    • https://pixasarajesuwov.weebly.com/uploads/1/3/4/6/134688766/5859476.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pubodetag.rf.gd/41096834898.pdfIn PDF document text
    • http://gurepabe.epizy.com/galipaxirogadinatojamajo.pdfIn PDF document text
    • http://gaxegumulot.rf.gd/bipilaxamafutibusokaz.pdfIn PDF document text
    • http://novufojanaka.epizy.com/financial_accounting_final_exam_cheat_sheet.pdfIn PDF document text
    • http://tituroxir.rf.gd/pest_control_trend_analysis_report_sample.pdfIn PDF document text
    • http://genovadeni.epizy.com/vocabulary_about_family_worksheet.pdfIn PDF document text
    • http://lunupesefobe.rf.gd/how_much_does_a_log_cabin_home_kit_cost.pdfIn PDF document text
    • https://todayshomeowner.com/wp-content/uploads/radio/files/2019/04/terry-from-alabama.mp3In 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
    • https://todayshomeowner.com/wp-content/uploads/radio/files/2019/04/terry-from-alabama.mp3'sIn 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_off0000cf2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2F 5160 bytes
SHA-256: abab790a9f462d61b84212dc55ae02840e1277de045ad726ae172884cfdab43d
font_01_sfnt_off0000e0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C4 10568 bytes
SHA-256: 6f50d2944f70278a107fbf34f9f9a0b8567191af11f92b8e9c6680ee5bf433c8