Malicious PDF — malware analysis report

Static analysis result for SHA-256 eff5ab966b494752…

MALICIOUS

PDF

86.3 KB Created: 2021-02-06 21:29:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c669a8a0480b34bbfb9912250a6fc7af SHA-1: 0854496b924516a2ab1e9ed94735f64df667c927 SHA-256: eff5ab966b49475200d8c232e5a5c2e3ae50dbbb777ee27c7e2a4b74706c5f7e
96 Risk Score

Malware Insights

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

The file is detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely serving as a lure for users to download an application. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing or malware distribution attempt.

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://maypoin.ru/aws?utm_term=project+cerberus+apk+uptodown PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4477863/normal_5fce7a1112eef.pdfIn PDF document text
    • https://cdn.sqhk.co/rawewosit/K22jjWO/26555398888.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/dijAiaS/95268387801.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/Migptjj/navel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383314/normal_5fd13b209b01c.pdfIn PDF document text
    • https://cdn.sqhk.co/rukokota/7i7H1yD/oscar_the_grouch_costume_infant.pdfIn PDF document text
    • https://cdn.sqhk.co/xojafimib/eieoS5F/movies_2020_full_movies_english_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sevalaturi/Cjbge1g/zombie_eaters_tab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_601d1602b51d5.pdfIn PDF document text
    • https://cdn.sqhk.co/lidojuxuxiro/kjehjic/dademimala.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/gCgegkr/word_blocksatz_letzte_zeile_auseinandergezogen.pdfIn PDF document text
    • https://cdn.sqhk.co/mekizojo/ftGiljb/xerafiza.pdfIn PDF document text
    • https://cdn.sqhk.co/xusovatovu/gijgjj3/growtopia_harvest_fest_date.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/UuaijV8/18269501767.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/ritoma/android_auto_music_apps_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/busch_gardens_park_map.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/aquatic_mammal_forming_a_pod_crossword_clue.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/40689719958.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/mexaribikifalapapexeleti.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/34936430301.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000119ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x119CE 26480 bytes
SHA-256: fbe792fa0b60906057034065c59c5e43147d5c77ab4c605531c187ff8d14e7f1
font_00_sfnt_off0000e465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE465 5408 bytes
SHA-256: 42f4a96486f500ea8f4eddf155a97eaab0bef2f558d6a96fd1c66f5de5b0b02f
font_01_sfnt_off0000f6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E1 10132 bytes
SHA-256: af53c22634a5bd69c7bca47043e8fcc665f295778353503e058a65dad1233d23

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