Malicious PDF — malware analysis report

Static analysis result for SHA-256 df7d932756397aaf…

MALICIOUS

PDF

75.8 KB Created: 2021-03-09 09:46:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b455cd492342ce7804c6cf253516c4b SHA-1: 9bd00f23fb68d762e4048af01ed3f4aa1b3c569a SHA-256: df7d932756397aaf131df41e3ba8796f27011b16fc3dab2447ea08c861f5962c
136 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, with a critical heuristic flagging it as a Pdf.Phishing.Trojan. The presence of an external URI pointing to 'nipisod.ru' and the heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicate a phishing or advance-fee fraud attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://nipisod.ru/wix?keyword=i+can+levitate+birds+but+nobody+cares
    • http://wamuwosola.mygamesonline.org/lexuzaxusepuwotupiwiruwa.pdf
    • http://wotidoteked.mywebcommunity.org/liwujetobabasebuwegewek.pdf
    • https://cdn.sqhk.co/zujumatatub/ojdggFm/vajav.pdf
    • https://cdn.sqhk.co/nuxazagugura/hLFgjjg/brasfoot_2020_registro_android.pdf
    • https://cdn.sqhk.co/nowovadizeb/MhfJUyX/sesijunajipawoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dd4c1ca0-43aa-4b49-a1d5-33e5aa07fad9/schools_that_offer_interior_design_in_philippines.pdf
    • https://s3.amazonaws.com/sowirutelevolur/82432511413.pdf
    • https://uploads.strikinglycdn.com/files/7475b0ea-24cf-4f6f-b53d-214c18e9e54c/dowifi.pdf
    • https://uploads.strikinglycdn.com/files/3a2b743d-1831-4139-988d-c0b20abc0094/jewemisonuwivetateluvu.pdf
    • http://penanaras.myartsonline.com/small_appliance_repair_green_bay_wi.pdf
    • https://uploads.strikinglycdn.com/files/f74a14c6-5732-4e92-88df-0692d91106d6/45151508951.pdf
    • http://mijovutotukedes.onlinewebshop.net/36501207980.pdf
    • https://uploads.strikinglycdn.com/files/d4a7ed71-69b0-4ea2-8af2-167658b0a9b3/how_to_login_router_admin_pldt.pdf
    • http://gujimosodaza.myartsonline.com/art_history_volume_2_5th_edition_free.pdf
    • https://s3.amazonaws.com/genijusemu/ancient_mesopotamia_form_of_government.pdf
    • https://uploads.strikinglycdn.com/files/390794f4-01a8-4d3c-bce0-fc72a955d760/robin_hood_disney_prince_john_plan.pdf
    • http://bidusibebawuz.onlinewebshop.net/sandisk_sansa_e280_8gb_mp3_player.pdf
    • https://s3.amazonaws.com/megujobemegor/cancionero_catolico_acordes.pdf
    • https://uploads.strikinglycdn.com/files/f2ebc377-1937-4da1-910c-308e0358f402/how_to_find_the_resultant_of_three_forces.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_off0000ec2e.bin
6f6f3e8c4ac4bdfc1e75f119ae6cffa8b2857248d968aed25f21054fce102511		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2E 5172 bytes
font_01_sfnt_off0000fdd5.bin
4a8c01bf15cfffdde9f334cea36e84eb370402e589bcd1c4485a2401a0e3b510		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD5 10672 bytes

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