Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb52e5d382d7cd18…

MALICIOUS

PDF

89.9 KB Created: 2021-03-12 01:50:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 05a9702f8e9df326a25a4f397b0c8acb SHA-1: 00e595773c13ccef0c20be4078b72b24540e4eb0 SHA-256: cb52e5d382d7cd18c750583ad9ca7e450d1d7c26e5e1bb1f6918a24f4e71f75d
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 directs users to a suspicious domain, likely for a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'award' and 'pdf', aligning with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://leonvi.ru/award?keyword=bullitt+center+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446650/normal_60068fe0e61ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421038/normal_6043fd313d20b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_5fd7dc9416cdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494417/normal_5fe713180af9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485329/normal_604698c1d55e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404290/normal_5fd1d0e478319.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/ig2hjgj/app_flickr_para_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460708/normal_601a41492159e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365656/normal_5fded3b844858.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401716/normal_5fc8e7ffec44c.pdfIn PDF document text
    • https://cdn.sqhk.co/suxepemup/LfDibgg/damaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465015/normal_5fe86b1c62734.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479675/normal_5ff9a53e3b267.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455399/normal_5fdf96ccb9788.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409840/normal_6024f700c52ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502175/normal_5ffa8206de22a.pdfIn PDF document text
    • https://cdn.sqhk.co/vasinabew/T9YHUib/amazon_kindle_unlimited_free_3_months.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://s3.amazonaws.com/woxotopapozokev/mgma_anesthesia_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/asking_for_formal_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/romeo_and_juliet_balcony_scene_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/tapogasukeju.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/81551157481.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/65694312728.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/wheel_and_axle_information_facts.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/how_to_get_better_freestyle_rapping.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_off00011904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11904 4584 bytes
SHA-256: a96d60aca4023a70d16c3ba3dfab1c3a0650720e1dbd4f6f13f497bc8fc1fcb0
font_01_sfnt_off000128a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A1 10504 bytes
SHA-256: f93b05b0d6300271d409030a8cfda81a216899e2f6c682571f4b3a089eea4e95
font_02_sfnt_off00014c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C51 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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