Malicious PDF — malware analysis report

Static analysis result for SHA-256 c438b0b2570a522e…

MALICIOUS

PDF

66.4 KB Created: 2021-03-03 16:23:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f8ea0c79c9f686efa65eee790b9bf927 SHA-1: 4d338dffbc229dcbdb083c9e096fc9efd0165291 SHA-256: c438b0b2570a522e10ea05829f45d82d3bf0f239e2cd4cfca7e74103968ad874
206 Risk Score

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://soxebez.ru/award?keyword=how+to+turn+on+consumer+cellular+flip+phone PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377414/normal_6007efb816cc1.pdfIn PDF document text
    • http://bogaxusamukuxid.22web.org/lolonekusaxafaxegop.pdfIn PDF document text
    • https://seruborakumew.weebly.com/uploads/1/3/4/8/134849990/jorope.pdfIn PDF document text
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/8573587.pdfIn PDF document text
    • https://jeludumekidi.weebly.com/uploads/1/3/2/7/132740852/basekosivevi.pdfIn PDF document text
    • https://nirixebuwema.weebly.com/uploads/1/3/5/9/135990662/fesibokekij.pdfIn PDF document text
    • http://sorujod.22web.org/einstein_bagel_nutrition_information.pdfIn PDF document text
    • https://danawojigu.weebly.com/uploads/1/3/1/4/131407111/voluvidejoxu.pdfIn PDF document text
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/wemotonelufigeketuta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pugasixowofizij.epizy.com/front_camera_icon_missing_android.pdfIn PDF document text
    • http://faduzidivatakid.epizy.com/kegoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/26292788167.pdfIn PDF document text
    • http://tuwofexuguxu.epizy.com/15043612321.pdfIn PDF document text
    • http://bujitajaxo.epizy.com/lagu_stay_with_me_jeremy_zucker.pdfIn PDF document text
    • http://teworubinogo.epizy.com/how_to_analyze_likert_scale_data_in_excel.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_off0000c71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71F 5308 bytes
SHA-256: 7487c9c5e7df345ebd223caf507e922d14aa6ec2b3df1a69ea0d09a6c4c34f22
font_01_sfnt_off0000d912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD912 10208 bytes
SHA-256: 72d2522a7e7bb0f3324b5adc975be531fb9982668bcfd28b9ad04d50993125b4