Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aa1598ba01cc858…

MALICIOUS

PDF

71.2 KB Created: 2020-11-20 18:04:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 31839a482a7b7d12a3cd2b247da40dd6 SHA-1: 7c29b3d745f961e29e7e2f939e34c2de550610e6 SHA-256: 4aa1598ba01cc858037067b4256bf2d1a08d6ec5838c79288663b4e2cd4c854f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=what+does+sar+stand+for+fafsa'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://cctraff.ru/123?utm_term=what+does+sar+stand+for+fafsa In PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/sesakaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f94efeed7846.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5f8c0115188c3.pdfIn PDF document text
    • https://demuxovepeb.weebly.com/uploads/1/3/4/3/134311881/9070028.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382414/normal_5f8b73e21dbf5.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/4045700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453885/normal_5faa6e59813a7.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/naluwaputatado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451355/normal_5fb7a20357b63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_5f9274f4efb0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385038/normal_5f8f34451b5c6.pdfIn PDF document text
    • https://nepigisebax.weebly.com/uploads/1/3/4/4/134477897/jijimojoganigi.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/lupuvogotog/junior_full_stack_developer_resume.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/conjunction_sentences_worksheets_for_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/28407306758.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/can_t_connect_to_starbucks_wifi_android.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_off0000da16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA16 4976 bytes
SHA-256: 295496bb82876ba18b0cc331d8eb2035d195a8988704a97a7b3c3801a3bd8417
font_01_sfnt_off0000eb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB07 10688 bytes
SHA-256: af9b2ab601b4a41be5e317e73177dffeefb3713ec12545f87bae92b974ed74d3

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