Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac8eaf80a5f0db32…

MALICIOUS

PDF

79.0 KB Created: 2021-03-29 16:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 38b0bccbd45968b56800258fc803b3ad SHA-1: 1326309e902082293fd08634c420dc4b4ad38d22 SHA-256: ac8eaf80a5f0db32753ba8d6dd688d8ee78eb909e11fac85528a6d7e62321ce5
144 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that exhibits characteristics of an advance-fee scam, including urgency and parcel delivery language. It contains multiple embedded URLs, one of which, 'https://xajibur.ru/strik?utm_term=diary+of+a+wimpy+kid+collection+-+12+books+%2528collection%2529', is flagged as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the download of a secondary payload via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=diary+of+a+wimpy+kid+collection+-+12+books+%2528collection%2529 PDF link annotation
    • https://xuzulofapoxe.weebly.com/uploads/1/3/5/3/135325887/kogagezob-woxiwuxemokimej-sagugi.pdfIn PDF document text
    • https://vaxetilunakado.weebly.com/uploads/1/3/4/0/134012354/a2a9d7.pdfIn PDF document text
    • https://kawapojironene.weebly.com/uploads/1/3/1/6/131637385/vebitopimamak.pdfIn PDF document text
    • https://cdn.sqhk.co/falunibesedo/iWdggzh/bukepedunanazu.pdfIn PDF document text
    • https://cdn.sqhk.co/wareberefiz/gj9iggh/happy_room_log.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunudixa/jdITigp/zombie._io_madness_survival_zombie_shooting_games.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/cgdg4ha/kufovikodizowugamile.pdfIn PDF document text
    • https://mizunilido.weebly.com/uploads/1/3/4/3/134352057/0f2a7d.pdfIn PDF document text
    • https://junurewumopu.weebly.com/uploads/1/3/2/7/132740614/xatazerudarasowot.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/354f5485-77bb-4598-bbec-b344f9dc27ee/free_niv_application_commentary_online.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/how_to_replace_battery_cyberpower_1000avr.pdfIn PDF document text
    • http://xevorerokune.epizy.com/immediate_resignation_letter_template_free.pdfIn PDF document text
    • http://vemefosa.epizy.com/pofixas.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/formule_arrondi_sup_excel_anglais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b2097fc-f68a-45a4-bc48-3054b34c7c9a/read_180_real_book_stage_c.pdfIn PDF document text
    • http://wivoruremuwun.rf.gd/66710364824.pdfIn PDF document text
    • http://witesibezixu.epizy.com/steins_gate_0_endings_explained.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/asphalt_8_highly_compressed_android_game.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/nbme_step_1_practice_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/aircrack_ng_1._2_free.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_off0000f11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11C 6068 bytes
SHA-256: fbdb86b6766fe312ead959c588c045e798ab6977ed85a348bfb2abc38e3da920
font_01_sfnt_off000105e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E6 11404 bytes
SHA-256: b5bba8cd276eb87ba3dc68fffd814f72411b4b27f774e5de25edf0d232528a9e

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