Malicious PDF — malware analysis report

Static analysis result for SHA-256 26cd3a42b6ec03f6…

MALICIOUS

PDF

79.0 KB Created: 2021-03-16 06:29:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbe60156618338229869804086c7780b SHA-1: 51ece929a8080fa3590a0b273f1a1621aad06c84 SHA-256: 26cd3a42b6ec03f658425e3bb8ee06a9bab74f7b674f7403bef4f6e671b5a360
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that masquerades as a whistleblower complaint, a common lure for phishing attacks. While no scripts were directly extracted, the nature of the PDF and the embedded URI suggest it is designed to redirect users to a malicious site, likely for further exploitation or credential harvesting.

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://dafemum.ru/award?keyword=whistleblower+complaint+pdf+searchable
    • http://warewakeb.sportsontheweb.net/el_embarazo_precoz.pdf
    • https://cdn.sqhk.co/rujuwawuju/0LijfqF/5544875699.pdf
    • http://weinmvc.net/18064653521updrb.pdf
    • http://fastpeysistem.online/essential_and_non_essential_elements_of_stateia66s.pdf
    • http://zabemaladameg.medianewsonline.com/84461601126.pdf
    • https://cdn.sqhk.co/sipobufiw/ijUBjai/77332985764.pdf
    • http://idealicaitalia-ufficiale.site/casanova_malayalam_movie_bgm_freeh5pe7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://kabuzore.atwebpages.com/dalixexakala.pdf
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_eb05e15f027f40748d3fa16408f69710.pdf?index=true
    • https://a0d2adcf-75bd-42a9-a42a-c23e1c6e9e1a.filesusr.com/ugd/85c99c_39cd4592efab4917befab90fc72e2c17.pdf?index=true
    • https://uploads.strikinglycdn.com/files/43ed9851-1ddc-407a-bab6-3a2161ff8778/polukivaselopavebipov.pdf
    • http://jabejanaboz.atwebpages.com/33036106311.pdf
    • https://s3.amazonaws.com/gurowozenupifi/45296404216.pdf
    • https://s3.amazonaws.com/jipowumat/bodyweight_workout_low_back_pain.pdf
    • https://uploads.strikinglycdn.com/files/5b042056-ea88-454d-b2b4-8df294f31976/fipur.pdf
    • https://s3.amazonaws.com/geradi/dyson_animal_vacuum_clean_filter.pdf
    • https://233b4d2f-9c44-4004-b776-098ebc281e6f.filesusr.com/ugd/7f980c_b95f14fd8eaf436a9fc5379af5f307f3.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e90d.bin
68326bae72b5af4d2459647e9e985463ac0545b2fd037d6398f32beb50eef0bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE90D 5428 bytes
font_01_sfnt_off0000fb5e.bin
628f47e2d8c66fd324fcc42dc943e51fdf6eba469d5e84afd99b4be2ca3aa504
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5E 10920 bytes
font_02_sfnt_off000120b3.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x120B3 4324 bytes