Malicious PDF — malware analysis report

Static analysis result for SHA-256 d191427d9b4cbad7…

MALICIOUS

PDF

79.2 KB Created: 2020-12-14 08:12:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c3cdf6b2a0aefbdb9770f74d440b3dca SHA-1: 72b90d1ceee0df715b4f42f4dedc0537a615bf10 SHA-256: d191427d9b4cbad75daf25e9baad2e8054a65b2e99c6bd16a5bb789dcf98ccc2
154 Risk Score

Malware Insights

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

The sample is a PDF document flagged as malicious by multiple heuristics and an ML classifier. It contains an embedded URL pointing to a known malicious redirector, traffking.ru, which is a strong indicator of phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'leading digital pdf free download', suggesting a lure. No scripts were extracted, but the PDF structure itself likely facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://traffking.ru/123?utm_term=leading+digital+pdf+free+download In PDF document text
    • https://verijijul.weebly.com/uploads/1/3/4/8/134861220/sivopozufuxusuda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471096/normal_5fc2a90a289ad.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/5c8067d7.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/mafavuzenoliki/ffa_emblem_meaning.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5377ebf71053ccb2bf723/t/5fce2698eb18547f4bad645f/1607345824913/new_york_tourist_attractions_map.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/employee_timesheet_web_application.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58f90b8467722f1f3741f/t/5fd63140154d727871e4f78d/1607872832259/28981843887.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/xiaomi_huami_amazfit_bip_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4e901a3-4014-4795-acd3-b54fcd3dc927/fiwivebebuduguzijal.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000102a9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x102A9 26320 bytes
SHA-256: fd8e9c2ff27cd956ef6d4027faf793bd1067a0216d41744d4af3f749f105a421
font_00_sfnt_off0000ce69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE69 5064 bytes
SHA-256: 2cb61c8d416e67987872c267cd9af1d0162f0744dd828155583b9fd570f2eaf6
font_01_sfnt_off0000dfca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCA 10132 bytes
SHA-256: 95e70646be9b91308cee55f60bc41fea9b6347fdf209decf9d4c4e4003b03446

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