Malicious PDF — malware analysis report

Static analysis result for SHA-256 f003dd73259a5dbf…

MALICIOUS

PDF

67.2 KB Created: 2021-01-18 02:03:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: eee4a095185da5a678bda6297e6ba90f SHA-1: 78312037ea7bcb6ffec545646365f6d27b666fec SHA-256: f003dd73259a5dbf48e8c0c4297f5d292d0033c96933e6f629e0029325612452
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a school calendar. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL is the primary indicator of compromise, likely leading to a phishing or malware download site.

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://traffine.ru/123?utm_term=west+lafayette+school+corporation+calendar+2019 In PDF document text
    • https://site-1191111.mozfiles.com/files/1191111/jikivir.pdfIn PDF document text
    • https://cdn.sqhk.co/porodiwaten/ZBHg6jh/mawurafulanuwejuze.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/hbkXBhb/business_relationship_manager_meaning.pdfIn PDF document text
    • https://site-1178226.mozfiles.com/files/1178226/annamalai_padam_song.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/7gigHcc/12120407875.pdfIn PDF document text
    • https://site-1180269.mozfiles.com/files/1180269/arsenal_gunnersaurus_chant.pdfIn PDF document text
    • https://site-1167931.mozfiles.com/files/1167931/30637236798.pdfIn PDF document text
    • https://site-1168348.mozfiles.com/files/1168348/pamurovibedadumajiluvujox.pdfIn PDF document text
    • https://cdn.sqhk.co/nagubeze/DKievjc/dopuxusenusibesumikebupov.pdfIn PDF document text
    • https://site-1178570.mozfiles.com/files/1178570/xepogoja.pdfIn PDF document text
    • https://site-1168207.mozfiles.com/files/1168207/play_impossible_gameball.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxinugokas/hfkjcha/prison_escape_films_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nitajosasa/pro_hacking_tutorials_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/53107667228.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/nejujisalifuvagodaduwojag.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/sowefadelurunonosejanul.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/5821762630.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/xuxufarazo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA09 5628 bytes
SHA-256: f436cdaa9710bb001942f8a22b9ce05cf20b8413711714c62690f3ba4937c1fa
font_01_sfnt_off0000cd39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD39 10076 bytes
SHA-256: 511fce6cb3ff2458a9e078987dd3517bb1bf0a8c94526d181384e030ae2a203f
font_02_sfnt_off0000efbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBE 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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