Malicious PDF — malware analysis report

Static analysis result for SHA-256 890c3e280913b3f2…

MALICIOUS

PDF

66.3 KB Created: 2020-11-25 09:47:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8540da8c21e8593e57f95956dca05823 SHA-1: 07c7e3e7852e12c563731fb437d0a1f7b2e15d1c SHA-256: 890c3e280913b3f21ee7aea1b5b6c92433840ff27bb03ce9c70e022741add8e2
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it is a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, contains metadata suggesting it is a disguised document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=cine+kodak+eight+model+25+history PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5f92c263b9a7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414869/normal_5faf538e24ab4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450512/normal_5fb98fb98fa37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413693/normal_5fb766b6ad2b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425514/normal_5f994f53543da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387408/normal_5f8d684098d1d.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/8af497e7-58ce-41b1-8bd7-5ed9a505b395/yeh_zameen_ruk_jaye_adnan_sami_mp3_song_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bab83256-32fe-4a78-ad48-4d82d1c31437/9829088380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec963fd4-6044-43dd-96b7-fc71c44698ca/city_of_bones_graphic_novel_online.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/how_many_calories_in_a_bag_of_popcorn_extra_butter.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/kizisizawejegisuxasis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82c3749d-b0d6-442e-8af0-060697fa5fbe/recording_the_beatles.pdfIn PDF document text
    • https://s3.amazonaws.com/wifozuxeku/i_wish_i_was_a_little_bit_taller_song_remix.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_off0000c674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC674 5564 bytes
SHA-256: 49099a8723838803f52ed3e878264356fe79af8568a0cbdeb7844ec8c739c1a4
font_01_sfnt_off0000d93f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93F 10376 bytes
SHA-256: de3a166e489280fc2e965d5a927b8ffbe903c48b182545df730f2dd47a157b0f