Malicious PDF — malware analysis report

Static analysis result for SHA-256 b48771038401eb73…

MALICIOUS

PDF

80.6 KB Created: 2021-03-17 01:08:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 97daf953b1d33ec2f9fc3aeeb0076e57 SHA-1: a0c31b161d986ca61e74ed1c52e82b188da74e19 SHA-256: b48771038401eb73bdbe3cfa9fb5c8a764e6cf18c7effa0dcca8d3a856dbfe27
116 Risk Score

Malware Insights

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

The sample was flagged by multiple heuristics, including ML classification and ClamAV, as malicious and a phishing attempt. The document body and extracted URLs suggest a callback phishing lure, specifically asking the user to call a phone number related to resetting a Uniden cordless phone. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely to facilitate a scam or phishing operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jottigo.ru/strik?utm_term=how+do+i+reset+my+uniden+cordless+phone PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474722/normal_604212716a877.pdfIn PDF document text
    • http://fadewujetenuve.mywebcommunity.org/isomerism_in_organic_compounds.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451955/normal_5ff436dc99bd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414360/normal_601d294826193.pdfIn PDF document text
    • http://zefujixa.mywebcommunity.org/80993192077.pdfIn PDF document text
    • http://lugodapamaj.mygamesonline.org/ruger_mini_14_scope_mount_installation.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414335/normal_5ff2b11c4dd33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_5fd14997a4f40.pdfIn PDF document text
    • http://vamefegali.mywebcommunity.org/neurogenik_bladder_adalah.pdfIn PDF document text
    • http://vaxiliwu.medianewsonline.com/encyclopedia_of_freemasonry.pdfIn PDF document text
    • http://ravovenovibu.medianewsonline.com/husqvarna_445e_ii_18.pdfIn PDF document text
    • http://gejejasofubi.mywebcommunity.org/how_to_convert_word_document_to_on_android_phone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475997/normal_5feaefac0fd27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419633/normal_602cf803634cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rirusozo/52000639180.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/game_dev_tycoon_apk_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/haier_portable_air_conditioner_manual_hpb08xcm.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/vampire_diaries_season_1_episode_3_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/lafatigedikej.pdfIn PDF document text
    • http://vewawisu.onlinewebshop.net/98610566133.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/how_many_types_of_expenses_are_there_in_accounting.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/zmodo_audio_not_working.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_off0000fc1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1A 5260 bytes
SHA-256: 9a570f749e84db1a377cdcbf3827c795d8524f62f4ea614ae169beb94de8d736
font_01_sfnt_off00010de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE6 11904 bytes
SHA-256: a7529464e67d583407e858f8a2b289f80b932995f76d7bd419d2c4d0ad50f9dd

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