Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5a5c6284f36d697…

MALICIOUS

PDF

72.3 KB Created: 2020-11-27 11:43:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b96db35b5b6b7bc584781c3e078597e5 SHA-1: 7d092b3a82d70dbdbaeda88b788e56495f321cea SHA-256: f5a5c6284f36d697e7fe31a761f0b93ff61cef08e23744d67a320f93c7a4fd80
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that points to a suspicious domain, likely intended to deliver a payload or phish credentials. The document body is heavily obfuscated and appears to contain metadata related to its creation, but no clear textual lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://traffnew.ru/aws?utm_term=pantaloons+ad+song PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f873d2f593e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406785/normal_5f99b33449d30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376096/normal_5fa6ed59c2b40.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://uploads.strikinglycdn.com/files/07ae5e3a-c944-48d7-a81b-1fb02b7d72a7/sports_head_soccer_2014_world_cup_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45e319fd-7bb1-49b3-bfc8-c9d95c90c98f/bubejinatubugirosokifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2565c35c-776c-400a-b546-080f7fdcd5ee/gamulipixewilevik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bccbe0b-6799-4b7a-95c0-8ef2f12dbe8f/one_wheeled_skateboard_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/seterus_loan_modification.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/lixiredagizejako.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/26162951912.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB795 4520 bytes
SHA-256: 6b808f9f5efc439e074bb92c6d7204b403c5bf31f40d8eeab271c27117e414fc
font_01_sfnt_off0000c6ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6EC 7936 bytes
SHA-256: 290b6c4f295a0474c1a91839ae1ccb10375c306648e53c20387fd61e43c0733d
font_02_sfnt_off0000e0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AE 11048 bytes
SHA-256: d8f1f3954f77e934ca13cf70d29a0934757756203582a797d114c4baebe1e68f
font_03_sfnt_off00010670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10670 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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