Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ee51e550230246…

MALICIOUS

PDF

81.8 KB Created: 2021-04-24 04:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5cf182e25704df37265b9c6bad456de2 SHA-1: 867b60c000ea7bdeff9005ed450757096e3cc395 SHA-256: 05ee51e5502302460bb08b501cebc4a6fbac5fd539541109ec50b5c34df18ee9
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://midufefew.ru/strik?utm_term=nikon+d3500+%252B+af-p+dx+18-55mm+vr+%252B+70-300mm+vr PDF link annotation
    • https://putesoborufo.weebly.com/uploads/1/3/0/8/130814126/bevisonikubatov.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/4743251.pdfIn PDF document text
    • http://duxinivodozular.mywebcommunity.org/scales_chords_and_arpeggios_for_piano.pdfIn PDF document text
    • https://sanositew.weebly.com/uploads/1/3/1/8/131872303/dawipalekala.pdfIn PDF document text
    • https://subogepaweb.weebly.com/uploads/1/3/2/3/132302814/8203500.pdfIn PDF document text
    • http://riwozizedilar.mygamesonline.org/99768843727.pdfIn PDF document text
    • http://vovegoguminos.iblogger.org/how_to_play_war_pigs_tab.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/sowoxuzutuvem.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/68f5c130-fddd-47ec-bd1f-3513662ca4bc/monster_hunter_movie_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1b48a47-86f0-45ab-bfd8-8bc05f4659e8/7423094511.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/rixudijinawovemijexiduxu.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/chinese_camera_translator_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e58913ec-ce79-455e-a7c7-be43659e02a8/are_lock_picking_sets_illegal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/232828b4-40c0-49ed-a74e-8f4841afa40f/magic_mouse_2_gestures_for_ipad.pdfIn PDF document text
    • http://rexefobixavater.myartsonline.com/pdfcandy_to_ppt.pdfIn PDF document text
    • http://gajopule.myartsonline.com/internet_search_strategy.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/wuzede.pdfIn PDF document text
    • http://soranodabiwegi.myartsonline.com/pretty_little_liars_the_perfectionists_chi__il_professore.pdfIn PDF document text
    • http://jajuzefob.rf.gd/50402575818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c23637ce-0674-444d-9df3-2acf063c814c/how_to_make_a_storyboard_for_business.pdfIn PDF document text
    • http://kanuximus.rf.gd/data_structures_and_algorithms_in_java_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/deadwood_sd_history_and_information_center.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/eurydice_sarah_ruhl_synopsis.pdfIn PDF document text
    • http://zedowep.atwebpages.com/93537293435.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/carry_on_suitcase_size_jetblue.pdfIn PDF document text
    • http://tabewozuzigenog.epizy.com/az_drivers_practice_test.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_off0000ffae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAE 5928 bytes
SHA-256: 7ef654b4a3d3492fca262ded8a82f7e2b7f5ce53ff64e03116754ea052bdaa9d
font_01_sfnt_off000113ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EF 10956 bytes
SHA-256: 389a0187d6792a4f704f94fc584bfb88bdc2c8a33b162ea5651d3065d682cd7a