Malicious PDF — malware analysis report

Static analysis result for SHA-256 d81a20e5dec9ad9a…

MALICIOUS

PDF

72.4 KB Created: 2020-11-25 17:22:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3902ddd7d9bcd3e044e3302f94e458bc SHA-1: 4c553a4dd32a0498c738a313dd1a78ee1d350550 SHA-256: d81a20e5dec9ad9a64d25c6e91158dcedc4a5f5b68897eeaab6d77f6a7d5a370
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that leads to a suspicious domain, likely intended for phishing or malware distribution. ClamAV and ML classifiers strongly indicate maliciousness, and the document body, though heavily obfuscated, suggests a lure related to 'Lincoln national forest weather'. The presence of embedded URLs points towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=lincoln+national+forest+weather PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383921/normal_5f8fadcc78527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418764/normal_5fb99eb7a420a.pdfIn PDF document text
    • https://duzigavejad.weebly.com/uploads/1/3/4/5/134513143/bd6be763297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411681/normal_5f9c9b9c1dbe5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f974c254b91a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427828/normal_5fb699634ed67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f91e24b3f982.pdfIn PDF document text
    • https://pufetebad.weebly.com/uploads/1/3/4/7/134711346/2888c1f1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370269/normal_5f9d565aac7a4.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/5d9200d6-05a2-4077-aef4-8612afb45f0f/6012466353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6d137e1-4549-4995-9904-f5ccc57d1ba2/how_many_calories_do_pushups_burn_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc936a9-72fa-4f98-92d7-eb7efe04ae73/72135655641.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/hssc_lab_attendant_question_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/62000889756.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_off0000d97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97C 5004 bytes
SHA-256: c2135da90cc7369ef7596894b39f79a8383a16a05e6a5694631020f71826f712
font_01_sfnt_off0000ea97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA97 12092 bytes
SHA-256: e8d7938b89e30646b45db8ed3671f0bc9739da97f02e15c7189d75e6c1d4cdf5