Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e605e95a0475da…

MALICIOUS

PDF

70.7 KB Created: 2020-11-09 23:31:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 71e180e7ffc958005ef30bd46537ab42 SHA-1: ba49a02805eb1696d2fb8d4b4421938e09169b95 SHA-256: e0e605e95a0475da14e1d1a70088d2127002f5f9ee4f3f37bdef1c405806a149
214 Risk Score

Malware Insights

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

The sample is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a PDF redirector and a link farm. It contains a large number of embedded URLs, with at least one pointing to known malicious infrastructure. The document body is heavily obfuscated, but the presence of numerous external links suggests an attempt to lure users to external sites for malicious purposes.

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
  • 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.
  • 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.
  • 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?keyword=the+villa+of+mysteries+pompeii+reconstruction In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f8988242393e.pdfIn PDF document text
    • https://fovejurifeke.weebly.com/uploads/1/3/4/3/134342496/c96883f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385435/normal_5fa29ab7645ec.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/feb8e1d0-a1e9-47cf-b790-c2464dcebb96/99_cent_stores_near_me_now.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/parallelogram_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/33826012092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b575797a-996b-4ee9-ae3c-0460fa40699c/california_4th_grade_science_curriculum.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/37779468297.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/briggs_and_stratton_1450_series_engine_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d91bf2a-06aa-446c-9c13-419cba27013c/barda_film_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd97dd96-2ce6-4710-bb01-f1178e131925/petrucci_font_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e0fc9d-83e1-490c-a025-fa1624c7f254/difibomigunijogufeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdf4faee-6ef2-4cce-a0c2-2db4b1f51e5d/7227158243.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_off0000d6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E2 5364 bytes
SHA-256: 511b4ad942553b5c2740e3fd532cbcbef0982ce16a902306edcd461808dafa5f
font_01_sfnt_off0000e90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90C 10156 bytes
SHA-256: abe980f84920c39dbb188a9113d5ccb09f655a2b32d54000d72cf5269c16eafa

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