Malicious PDF — malware analysis report

Static analysis result for SHA-256 71b6fb8018ca746c…

MALICIOUS

PDF

123.9 KB Created: 2021-02-05 17:55:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: cd86e6e7f6641c50ba678cc5a638f719 SHA-1: 18a100c6fcfe4d90b2ceefde951a4fec3ae4b0b8 SHA-256: 71b6fb8018ca746ce9365c6092c0850561b2fb5a53d46d2d262a1580fa1b8d21
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text related to a sensitive historical query, suggesting a social engineering lure. The presence of external URIs, particularly 'https://baarspo.ru/123?utm_term=why+is+germany+to+blame+for+ww2', strongly suggests the document is designed to redirect users to a malicious site for payload delivery.

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
  • 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/123?utm_term=why+is+germany+to+blame+for+ww2 PDF link annotation
    • http://fofafowazu.66ghz.com/gimemefenekajitolibidane.pdfIn PDF document text
    • http://detonic-hypertonie.website/information_technology_for_management_10th_edition_freel857u.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/hsFguvE/boulangerie_patisserie_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/pumevigatare/jfPgduF/mitademililisiwogu.pdfIn PDF document text
    • http://persequenteamsohbet.com/883608311399krty.pdfIn PDF document text
    • http://tublitalia.space/bluebook_20th_edition_download4osmw.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/wanalovum/xuwuvetomak.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/android_get_wifi_password.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/fractional_indices_worksheet_with_answers.pdfIn PDF document text
    • http://luzutajezilako.rf.gd/kixitutujexomopuxavipo.pdfIn PDF document text
    • http://fedukiz.epizy.com/zagoridowajozegokeso.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/vikilobuzowanubeluvoka.pdfIn PDF document text
    • http://renedutej.rf.gd/axel_foley_theme_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/convert_bitmap_into_drawable_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_off0001a51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A51D 5660 bytes
SHA-256: 2171dbc43129aefa4698c0698da31b59d7279dfbd0d80354f796800b7f4bcf52
font_01_sfnt_off0001b859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B859 13128 bytes
SHA-256: aa4741c6b0b9dc1e84aa0070a010e7e2a42f39a272910f2f68f037f9faf907fa

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