Malicious PDF — malware analysis report

Static analysis result for SHA-256 4894cf7890e754b8…

MALICIOUS

PDF

74.1 KB Created: 2020-12-05 22:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e9154a87213505b1cc562b02214b21f4 SHA-1: d4d09fa10cf02c867c38fc630cbf8d472c3be02c SHA-256: 4894cf7890e754b8382a9a3cf3398362d9ca7c7ae0a5759a37388f02bffa0b30
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or SEO spam. One of the primary URLs, 'https://traffnew.ru/strik?utm_term=the+complete+dead+sea+scrolls+in+english+pdf', appears to be a malicious lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffnew.ru/strik?utm_term=the+complete+dead+sea+scrolls+in+english+pdf PDF link annotation
    • https://nusekaturorofu.weebly.com/uploads/1/3/4/0/134095869/2361693.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/sujolosi.pdfIn PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/fadofaxavokagat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455898/normal_5faf03f93f6e4.pdfIn PDF document text
    • https://fezulenigi.weebly.com/uploads/1/3/4/4/134485980/bbee82b3c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc110e511f6a419848698ae/t/5fc835a613f8d93bf2fc34c2/1606956456236/puwipij.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/openshot_video_editor_for_windows_7.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1175aa879396864096daa/t/5fc3264fe6d49a06bbf9d1d3/1606624850409/nigilidegobizelon.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5ab97405d5340f34a42aa/t/5fc7a4037995075abdeafde8/1606919171994/versus_tournament_full_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/imbalanced_nutrition_less_than_body_requirements_related_to_diabetes.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/canine_dental_chart.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ac42a5bc066edfb10807/t/5fc79a4cc953717e09ddfdde/1606916685809/how_to_draw_like_marvel.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
stream_002_off0000e4c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE4C1 5516 bytes
SHA-256: 4a066ac635b7a1c8f381635d74a818bdfd896009d2d8619428b845f84f908662
font_01_sfnt_off0000f754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF754 11124 bytes
SHA-256: 168717f7bf852e69de41640998c7a98b296dd85646d45a0acf69d9e652502b0c

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