Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2d5c4989cd5f10…

MALICIOUS

PDF

255.2 KB Created: 2021-04-24 05:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: dde73e3cf5600a781113914190b6eb14 SHA-1: 289050471386d8a264e06dba86ffa8a5fe380381 SHA-256: 1c2d5c4989cd5f108cec23c2f5af2071351e15969b22d9e1e042a9542b62f548
96 Risk Score

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. It contains an embedded URI pointing to a URL that appears to be a lure, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDF documents from web content, which could be leveraged to disguise malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9879

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://xajibur.ru/strik?utm_term=sony+xav-ax1000+reset+button PDF link annotation
    • https://cdn.sqhk.co/butexuvokufo/hIcigji/rezagedizulugumanatexu.pdfIn PDF document text
    • http://artemk.ru/android_chronometer_countdown_examplezdrzq.pdfIn PDF document text
    • https://cdn.sqhk.co/vamosopon/ifWhjge/dinajolerujexizoganixike.pdfIn PDF document text
    • https://cdn.sqhk.co/dolavalof/jgCjhhh/strawberry_shortcake_ice_cream_sandwich_blue_bunny.pdfIn PDF document text
    • http://magic-spring.com/all_cheerleaders_die_part_2_releasekl3fv.pdfIn PDF document text
    • https://cdn.sqhk.co/vulasobifow/aWZR2gf/broadview_security_system_user_manual.pdfIn PDF document text
    • http://shimano-stradic.ru/how_to_repair_home_ac_unitope3h.pdfIn PDF document text
    • http://jewlgems.com/futujitisusksq4.pdfIn PDF document text
    • https://keziputaxa.weebly.com/uploads/1/3/2/7/132711938/vatizizut_gupeka_linusunode.pdfIn PDF document text
    • http://pusosokus.iblogger.org/bone_density_test_screening_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/turogepufe/mij4iea/58789228400.pdfIn PDF document text
    • https://zoponexe.weebly.com/uploads/1/3/1/6/131606878/154559.pdfIn PDF document text
    • http://italonewsero.site/bipamavuxinejubajunujojukh6a0c.pdfIn PDF document text
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/fazifidozidujaxo.pdfIn PDF document text
    • https://lapaluletegole.weebly.com/uploads/1/3/4/6/134679291/385c181c73ac.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/ae0dd8e6-ea86-4034-becd-9c2109402fda/17417148721.pdfIn PDF document text
    • http://bomowufawifebi.rf.gd/76533451333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4d7cf5b-b1b3-4fb6-9043-a1dd9074b21f/2013_camry_recommended_maintenance_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e0317c4-b3e0-4c50-bb69-7febd35558d4/samsung_galaxy_note_3_neo_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b9b8727-0c4e-4eca-9039-96b97b65c445/samsung_j6200_hdmi_arc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a098d01-5953-4eaf-9e2e-db2fb2ea1473/jogikudibalawidijimiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0390a22-769f-4f60-a819-cf2b50e2e25c/c_primer_lippman_6th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1045156a-a78c-49af-967d-f7a31aba6b12/3798770581.pdfIn PDF document text
    • http://tutunod.epizy.com/21093039151.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_off00039ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39EC4 5348 bytes
SHA-256: 483234aae62ab2b3661c61888d361b5fad0a78d53843e69b05663b89fb2482be
font_01_sfnt_off0003b117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B117 22936 bytes
SHA-256: ed89b92c93c27eff3d0f561550f1e8bf410dc813567e3cc322f0c9b07ea76faf

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