Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f7ce90ba2e651a5…

MALICIOUS

PDF

64.0 KB Created: 2021-02-11 19:14:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d48f1639dab419eca5f413e228f211aa SHA-1: 9e163e690c6e17c51c37b280bebb76ae1b2ef8bd SHA-256: 0f7ce90ba2e651a541fabf08d58f466b1f8eb4f9d11685cc0c978ea1ee9683e1
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://yafferge.ru/wb?keyword=paramore%20misery%20business%20guitar%20tab%20pdf'. This URL is likely used to redirect the user to a malicious site for phishing or to download further malware. The ML classifier also strongly flagged this PDF as malicious.

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://yafferge.ru/wb?keyword=paramore%20misery%20business%20guitar%20tab%20pdf In PDF document text
    • http://dixojele.22web.org/chocolate_cake_recipe_sinhala.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/rorives/cease_and_desist_libel_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/harmonic_series_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/81919450415.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/comprehension_for_grade_2_worksheets.pdfIn PDF document text
    • http://luvomovasofigu.rf.gd/13618146410.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/bumblebee_transformer_costume_diy_cardboard.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/best_workout_tracking_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/pixexo.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/44319540345.pdfIn PDF document text
    • http://josatagosovux.rf.gd/antibiotic_prescribing_guidelines_primary_care.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/cerere_concediu_odihna.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/drdo_application_form_online_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/ain_t_no_mountain_high_enough.pdfIn PDF document text
    • http://tokeparab.epizy.com/god_of_war_2018_valkyrie_guide.pdfIn PDF document text
    • http://lapukup.epizy.com/21135292384.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_off0000bc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC0C 5572 bytes
SHA-256: 9e1176efe6ee382b150662aa3a90ffa0b4027658535cab6dcb1c19b94feac762
font_01_sfnt_off0000cef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF3 10552 bytes
SHA-256: 16e8e5b6175dc1ac019665cd80aa312e59d7d1d1b4c81f615104a8050c9ebfe9

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