Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d13b9fd138a4a36…

MALICIOUS

PDF

82.8 KB Created: 2021-03-31 02:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3295f0b3cfeccc7b59b328378a0a320b SHA-1: d49f7ee8f5f7d65fb3354d380fdfffccee5304d4 SHA-256: 7d13b9fd138a4a36248a94631c96597d28cd98f1b0f5d29d07774fc5f06ba86c
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to 'Arbor networks aps 2600 datasheet', suggesting a lure to disguise the malicious intent. No scripts were extracted, but the presence of external URIs and the high confidence malicious verdict indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=arbor+networks+aps+2600+datasheet
    • http://fodefon.getenjoyment.net/blank_biodata_form_download.pdf
    • http://sadogiropi.mypressonline.com/kanaf.pdf
    • http://musuwefamomare.22web.org/architect_studio_companion.pdf
    • http://rezumitisud.mygamesonline.org/ibps_guide_2020_banking_awareness.pdf
    • https://cdn-cms.f-static.net/uploads/4458623/normal_6034170d30750.pdf
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5fda2b3256c29.pdf
    • https://static.s123-cdn-static.com/uploads/4494673/normal_5ff263f643af9.pdf
    • https://cdn-cms.f-static.net/uploads/4369659/normal_6022f7a2875d2.pdf
    • https://cdn-cms.f-static.net/uploads/4402737/normal_603526eef04c7.pdf
    • https://cdn-cms.f-static.net/uploads/4376602/normal_606390cb8235b.pdf
    • https://static.s123-cdn-static.com/uploads/4450418/normal_6006ac628ea9e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/lanorolowu/free_letterhead_template_photoshop.pdf
    • http://kemixirutuj.epizy.com/in_the_blink_of_an_eye_full_book.pdf
    • https://uploads.strikinglycdn.com/files/190b4dd5-428b-4507-b2fc-8aef2ad4d0d0/pepemabevidu.pdf
    • https://uploads.strikinglycdn.com/files/1b0bd2f8-c1ff-4740-b721-52e481f32889/97701280387.pdf
    • http://lidesesepaz.rf.gd/coach_carter_unit_1_review_answers.pdf
    • https://uploads.strikinglycdn.com/files/9c5da50f-ea71-4dc0-a653-cd1ae7df367d/what_is_a_breach_of_health_and_safety_at_work.pdf
    • https://s3.amazonaws.com/pujinit/66466108315.pdf
    • http://gozuketitara.onlinewebshop.net/antenatal_examination.pdf
    • https://s3.amazonaws.com/tamobalasu/30201752083.pdf
    • 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_off0000f7e9.bin
ae75354e5914c8e4ab0baf25871a72926a9c7627d44a612e2e376f6fb6a51100		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E9 5468 bytes
font_01_sfnt_off00010a6f.bin
b1c3fef1649bfefd067ed0dc506275534592585d9f66c9b3ef5afea2ebd67b88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6F 10900 bytes
font_02_sfnt_off00012fa5.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA5 4324 bytes

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