Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a8fe13085309225…

MALICIOUS

PDF

84.8 KB Created: 2021-03-30 13:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39a845bad6cf9a2fc9da4648180c89dc SHA-1: e541fc1d838dcfe099f70fc113b6a516749792f5 SHA-256: 7a8fe130853092253f63cfec67635c235c9727c748e924ab7cccdb649ca8bcc5
136 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. The embedded URL points to a domain associated with malicious activity, further supporting the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ponafet.ru/123?utm_term=honda+civic+2019+hatchback+manual
    • http://nizavevorupuj.mywebcommunity.org/kurunijaxisipolemogebuzir.pdf
    • http://fomoregekamikat.mypressonline.com/pen_and_ink_drawing_workbook_alphonso_dunn.pdf
    • http://kudijajipiwi.iblogger.org/71852632692.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zafibimutadoti/42919266586.pdf
    • http://litorow.myartsonline.com/46974766396.pdf
    • https://s3.amazonaws.com/lixasifasi/firasabusegebemune.pdf
    • http://meguribezupi.epizy.com/10899532775.pdf
    • http://rilobun.rf.gd/business_code_of_conduct_template_uk.pdf
    • https://uploads.strikinglycdn.com/files/0f239ae5-563f-4f23-a107-abcb3a6028de/what_causes_dark_romanticism.pdf
    • https://s3.amazonaws.com/wiwuxot/earl_nightingale_the_strangest_secret.pdf
    • https://s3.amazonaws.com/gizonukorad/62188095422.pdf
    • http://mopizozusixunes.rf.gd/2427732337.pdf
    • https://s3.amazonaws.com/kugelilizibuwum/32406469045.pdf
    • http://misanedajog.myartsonline.com/algebra_formulas_for_ssc_cgl.pdf
    • https://s3.amazonaws.com/mizeteb/74816683483.pdf
    • http://wuvoxebegef.rf.gd/38266776732.pdf
    • https://s3.amazonaws.com/febopa/47531967101.pdf
    • https://uploads.strikinglycdn.com/files/d410d584-69df-4ae2-8508-f7a1e1d3126c/pasos_para_formular_un_algoritmo.pdf
    • https://s3.amazonaws.com/towutoginadivu/xoluzotirobiritafona.pdf
    • https://uploads.strikinglycdn.com/files/7cf49d84-e027-47b5-aa78-008ca466d526/43835615421.pdf
    • https://s3.amazonaws.com/lekezaru/sajibibefafenonur.pdf
    • https://s3.amazonaws.com/guxosa/chromosomes_and_dna_replication_answers.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_off0001008e.bin
ed890ea8e9c13e707e0b8772785df4c8e07233f3dd04625abacf920c6cd28a2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1008E 5612 bytes
font_01_sfnt_off0001137e.bin
93be6ffae20bc6daf2b9cedd8b6106235c1054a6214cc2a290c9def1cb5833a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1137E 1828 bytes
font_02_sfnt_off00011c76.bin
0f6f741957c705a3d4dad516518dcda6c2c35d6bf36d2603b94cdcb1e1ae17b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C76 12212 bytes

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