Malicious PDF — malware analysis report

Static analysis result for SHA-256 1454778ca6991818…

MALICIOUS

PDF

165.3 KB Created: 2021-06-12 11:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1e476937f3d4864564f2eb45afb85642 SHA-1: b004c0ead267a42eb98730db438b50b04531ba5f SHA-256: 1454778ca699181891d9ef4ff0b22fd8b543833fdf9011db942892efa593826e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL, https://inwebjor.ru/pbw?utm_term=men+at+arms+terry, is the primary indicator of a phishing or malware distribution attempt. No scripts were extracted, but the presence of an external URI and the overall malicious verdict strongly suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://inwebjor.ru/pbw?utm_term=men+at+arms+terry PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475375/normal_603844582b43a.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4465269/normal_60b7928314614.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_603b05f6bd042.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445868/normal_5ff360edaae58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409257/normal_606a7ba2b85cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416125/normal_603960d025bf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459636/normal_602795851ae15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_600eafbbceeb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389824/normal_603430faf3de6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393631/normal_5fe24b591e10a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412780/normal_5ff4d86e6b001.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446155/normal_601fa91812fa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378390/normal_6062eaff734d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403684/normal_5fcd2f00cb98a.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/a6e1d001-162f-43cf-9d77-7d90198a5280/what_is_the_ideal_internal_temperature_range_for_meat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f36e31c-6a01-4699-aafd-178aa821135c/72821035358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a51a7caf-6d8d-4e42-a0bc-1333f1693bd9/is_v_shred_app_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5b54243-42cb-4e39-9f94-1a1c099992de/22262735641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa1553f9-98a7-4bb0-98fb-7fa59b313e12/how_many_cfa_charterholders_in_the_world_2020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000240df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x240DF 4536 bytes
SHA-256: 16c9354c6f87e95cd817ac65cf1d02e751cbd030c9aa765c019fb85fcc27bd27
font_01_sfnt_off00025020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25020 13200 bytes
SHA-256: ddda800720b3e41ff87e3cad58120f55705a79239e650c7e8c684866dfd63863
font_02_sfnt_off00027a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27A03 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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