Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7eb4d82fe639244…

MALICIOUS

PDF

93.1 KB Created: 2021-03-24 23:49:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3670d776878bf6f897bbcd36a55f6860 SHA-1: a6073fe43072f32820f00d67f5533200e6901033 SHA-256: a7eb4d82fe63924454a7859c503a82bc8bc6647e7948d4b6b29ced66be457c1f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is highly indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the presence of an external URI suggests the document's primary purpose is to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

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://jacksth.ru/strik?utm_term=the+fall+of+the+house+of+usher+summary+and+analysis
    • http://vifubavawet.mygamesonline.org/3d_printing_technology_seminar_report.pdf
    • https://cdn-cms.f-static.net/uploads/4451217/normal_601865ff548b0.pdf
    • https://static.s123-cdn-static.com/uploads/4461523/normal_60011b989dbd8.pdf
    • http://tejowigasinafu.getenjoyment.net/what_spices_are_in_togarashi.pdf
    • https://cdn-cms.f-static.net/uploads/4468871/normal_6040555ae24e1.pdf
    • https://static.s123-cdn-static.com/uploads/4488817/normal_5fcb6d5c804b1.pdf
    • https://cdn.sqhk.co/kawiwitifa/eigjdjd/guess_the_phrase_with_pictures_game.pdf
    • https://static.s123-cdn-static.com/uploads/4417643/normal_5feb2377196f8.pdf
    • https://cdn-cms.f-static.net/uploads/4393181/normal_60566d546ee20.pdf
    • http://bijepitujutix.sportsontheweb.net/83972184463.pdf
    • https://cdn.sqhk.co/jagibuvat/jajgots/dawijasowikewirapaxazurat.pdf
    • https://cdn-cms.f-static.net/uploads/4416513/normal_60475ce506130.pdf
    • http://tifeguga.22web.org/general_information_sheet_sec_2019.pdf
    • https://cdn.sqhk.co/bumogebiz/Ihad2hc/moto_g_power_case_verizon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1a90f794-6955-4d95-9597-59184ad1e01c/napegegixorosokilebajatad.pdf
    • http://gebilame.epizy.com/21798329315.pdf
    • https://uploads.strikinglycdn.com/files/580d5999-f2b6-468f-abe2-7d5f46cab4f3/macbeth_full_script.pdf
    • https://uploads.strikinglycdn.com/files/9b8a0895-5403-4450-8ba7-ffe5f525448a/dupolapubenijuladifisijiv.pdf
    • http://zejeriwetijetez.rf.gd/thiruvalluvar_university_bsc_computer_science_syllabus.pdf
    • http://babefuv.epizy.com/ntpc_dadri_internship_report.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012da2.bin
16c30e14554101f530071c7f1406c3ef8a9aa16c071f607f4368f5acfc922811
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA2 5196 bytes
font_01_sfnt_off00013f2b.bin
5d8aab954b84a09da0b6be49fe43d091f71a031bb790d0a3200382eb8af05df0
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F2B 12452 bytes