Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c8abff547919e64…

MALICIOUS

PDF

71.5 KB Created: 2021-03-18 23:59:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 510f01764afa4d8d2ec6e7ddd7c56cbe SHA-1: 242bcd733dd139fcb39dc04278618975fd892ea6 SHA-256: 0c8abff547919e64985d58474918063bd75f68126f47e90e8e56f7833f69cc83
96 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and heuristic detections indicating malicious intent, specifically a phishing lure related to a Stihl warranty. The ML classifier and ClamAV detection strongly suggest maliciousness. The presence of external URIs points to the document's role in directing users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=stihl+fse+60+warranty
    • https://lefazuditipuk.weebly.com/uploads/1/3/5/9/135967508/wuvasufevis-fibedupun-xirid.pdf
    • http://fapasevusiledap.mygamesonline.org/semi_detailed_lesson_plan_in_english.pdf
    • http://lilozekakotelup.sportsontheweb.net/52490161203.pdf
    • https://wisetigu.weebly.com/uploads/1/3/4/3/134357320/soduxata-fokarifobazivi-kuwive.pdf
    • https://buvefejam.weebly.com/uploads/1/3/1/4/131453018/mugiva.pdf
    • http://kexedeziferu.sportsontheweb.net/amla_plantation_project_report.pdf
    • https://cdn.sqhk.co/mogizilo/he7Qjev/bivivogoxivuwonotokemabom.pdf
    • https://cdn.sqhk.co/wanevakaxuma/hhhdGgf/electrician_apprenticeship_rates_ireland.pdf
    • https://bazopozetera.weebly.com/uploads/1/3/1/6/131637116/danox_kotadonapowadud_gevifozerapaw_wozinajabawil.pdf
    • https://cdn.sqhk.co/zuxifobiro/fjbLie5/como_te_voy_a_olvidar_piano_sheet.pdf
    • https://tinutenuku.weebly.com/uploads/1/3/4/6/134664278/c9a73e1369.pdf
    • http://vitonidero.medianewsonline.com/timifabolisededatu.pdf
    • https://cdn.sqhk.co/fasuzozo/ggiaTib/classdojo_app_windows.pdf
    • https://nifevokore.weebly.com/uploads/1/3/1/4/131437532/lumadirotupibesudasu.pdf
    • http://felagem.getenjoyment.net/d_and_d_building_wallpaper.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/e162487c-098c-4e25-ac38-2b013cf83b61/woledefuwerivarara.pdf
    • https://uploads.strikinglycdn.com/files/b7910454-15c7-4597-9cef-07607b1713c7/08_dodge_avenger_starter_relay.pdf
    • https://uploads.strikinglycdn.com/files/826bbff0-020b-402d-822a-3ae96866fbc7/42181069243.pdf
    • https://uploads.strikinglycdn.com/files/5f885104-db78-4cb9-9f4e-f49bf8b1a05d/gnostic_gospel_of_judas.pdf
    • https://uploads.strikinglycdn.com/files/53620bee-1b03-4d37-aab1-1c76381ee030/94628505949.pdf
    • https://uploads.strikinglycdn.com/files/82b86e28-93c1-4adb-9608-04764e13dd8b/sonic_pi_tutorial_youtube.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_off0000cbca.bin
e2ea993cf940b0926952c761652def2c290b49f5afaf89efd7bf815b6d9094af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCA 5124 bytes
font_01_sfnt_off0000dd29.bin
ff71a04a4b355f8dfd34c4502b3aa065c6564005ac119d8d168076371e0cc0d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD29 11008 bytes
font_02_sfnt_off000102af.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102AF 4324 bytes

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