Malicious PDF — malware analysis report

Static analysis result for SHA-256 c67a09d859f9357e…

MALICIOUS

PDF

75.1 KB Created: 2021-01-10 08:45:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 05acbbcb987a84fc5f9018d5c33d4e37 SHA-1: bbbfe963acec787235a25c83fe0feb9c46013eb2 SHA-256: c67a09d859f9357ed6cba3e1283bba9975160c97fab79a1b8867bddfa8573c59
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is likely intended to lead the user to a phishing page or a download for a second-stage payload.

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://gettraff.ru/123?utm_term=new+paltz+central+school+district+budget In PDF document text
    • https://cdn.sqhk.co/razefudixid/XYSaqtS/cbse_class_9_sst_deleted_syllabus_2020-_21.pdfIn PDF document text
    • https://cdn.sqhk.co/numanazolov/jjERegh/downhill_mountain_bike_racing_2020.pdfIn PDF document text
    • https://site-1177610.mozfiles.com/files/1177610/disney_films_for_toddlers.pdfIn PDF document text
    • https://cdn.sqhk.co/gulofiji/hgdSUr0/zugovodirosefe.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/gupuso/free_bill_of_sale_template_for_car.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/changes_anthology_of_short_stories.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/31759872685.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/wonolulojumajexeliku.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/nawexulavuwinexasipi.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/lemejupulif.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/les_precieuses_ridicules_english.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/android_phones_no_contract_unlocked.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/boxifivanenetajipokeben.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_off0000e6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B2 5588 bytes
SHA-256: a28fe9f00d1feab9be7b7ee38a6deeb21ac708af3bc0f91c9f24a6db6257a261
font_01_sfnt_off0000f9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C0 10940 bytes
SHA-256: 4a4113774208374da14b208291fee9f91d539298517ff4b650843d18ca205adb

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