Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a6f4b885c59d7c…

MALICIOUS

PDF

103.8 KB Created: 2020-11-18 08:17:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f0be1f1f4396d9aeec3a149b7c8df584 SHA-1: 58fc1b28f2d9d27a01589004651f87db1eb20cd1 SHA-256: f1a6f4b885c59d7ca8baac5cbd572e953fda27da2e12175d5a82be9231ac6719
154 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics, including a critical alert for a malicious redirector link and a high ML score. The embedded URL, https://traffine.ru/123?utm_term=what+is+the+controversy+concerning+shepard+becoming+a+spectre%253F, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'controversy concerning shepard becoming a spectre', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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=what+is+the+controversy+concerning+shepard+becoming+a+spectre%253F In PDF document text
    • https://cdn-cms.f-static.net/uploads/4483082/normal_5fa73d9f9cd09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_5f9abda466f7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5f92132132d4b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eddaf77-c1c6-43e3-a7aa-31e08e277ef3/strong_start_arbonne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/797f1a58-7900-40ed-a097-d038704e8088/wejegegazoxejadibuxibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f195784-75e7-4644-a2ba-ed1982cf2be1/fesipabevumirewas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ae48dd7-5c32-4771-9cd5-1ede13a6f983/pawup.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/5814414750.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/kirudibetokabuziragarajux.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/91189297268.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_off00014b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B4C 5912 bytes
SHA-256: bbc29aa4e7cb275819b634e71455309891a34d76de806529701ba2627f1c362e
font_01_sfnt_off00015f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F4F 16284 bytes
SHA-256: 0bf8439a061264417817dfee5e44af72c84e805c99ee46e7da875d71c1b0b11c