Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2c02a3d23580f1…

MALICIOUS

PDF

76.7 KB Created: 2021-02-27 16:06:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 285f831dc1f01a5ad3146943bf98e327 SHA-1: 8b8b54d4cee78b2b92c4483699f155ff1e8fe7a3 SHA-256: cd2c02a3d23580f16db56533ced92fbe4d7dcf4a405281f28e15b4e2b4eb7c1b
146 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it's a link farm on disposable hosting and a callback phishing lure. The embedded URL `https://baarspo.ru/award?keyword=schlage+keyless+entry+not+working` suggests a phishing attempt related to product support or a scam. No scripts were extracted, but the PDF structure and URL patterns are consistent with attempts to redirect users to malicious sites.

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 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) 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://baarspo.ru/award?keyword=schlage+keyless+entry+not+working PDF link annotation
    • http://whysmall.space/56673421299glvzz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387219/normal_60111574e77d6.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/setting_citizen_blue_angels_watch.pdfIn PDF document text
    • http://deutschebank-meine.com/number_conversion_binary_decimal_octal_hexadecimalayns5.pdfIn PDF document text
    • http://rufujatev.iblogger.org/vupul.pdfIn PDF document text
    • http://instasale.company/math_worksheets_4th_grade_multiplicationfgbch.pdfIn PDF document text
    • http://taxokijoba.sportsontheweb.net/gikazujinumuvil.pdfIn PDF document text
    • http://ampinternational.org/gitagirikileresudi781qs.pdfIn PDF document text
    • http://mantenancie.com/wokawofodufisujenigiwap0u.pdfIn PDF document text
    • http://dilawiputonu.mypressonline.com/65852699444.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/76787646209.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://damatagowigiz.epizy.com/answer_back_band.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/anger_management_activity_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/cisco_9865hdc_mr_dvr_server_hd_2gb.pdfIn PDF document text
    • http://mawabubobiniz.rf.gd/92707912025.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/geosphere_review_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/34773553030.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_off0000eeaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAA 5424 bytes
SHA-256: 84128293a8b5b46c17c30e11f5bb1ee60ccc140b8b0dc5fa9d50b368516ae528
font_01_sfnt_off0001012e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012E 10796 bytes
SHA-256: 15dc678473006e60e972eb54e26e11621f439ebabe26ac316152c241c3b8f4d3

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