Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a7a3de471fbd5c…

MALICIOUS

PDF

78.8 KB Created: 2021-03-12 02:58:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: f16e01be10ef5adaadd743c6b5b1254e SHA-1: 3eae875ac7f718d8661f96ed1191d4a149ae64fd SHA-256: 27a7a3de471fbd5c4be5e6b9121dc9c4548d2d12a2730fb861fe58cffcfaf9be
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to pairing LG Bluetooth headsets, directing the user to a suspicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URI is the primary indicator of compromise.

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://xajibur.ru/strik?utm_term=how+to+pair+my+lg+bluetooth+headset PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426957/normal_6006dc0ce5aec.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/ehfjjVt/drifty_chase_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/jehbqhg/65012585099.pdfIn PDF document text
    • http://fejiximodanu.mygamesonline.org/20672761967.pdfIn PDF document text
    • https://cdn.sqhk.co/nulojokine/iiRLzgd/linear_variable_color_filter.pdfIn PDF document text
    • https://cdn.sqhk.co/gatavazer/jgQfKom/drum_set_for_sale_used.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvazuginu/7ifzhdN/rec_screen_recorder_pro_apk_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454821/normal_6015b5e0ee1aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452199/normal_6039f5fa473b4.pdfIn PDF document text
    • https://cdn.sqhk.co/sunawopi/pYRAigU/joplin_high_school_football_live_stream.pdfIn PDF document text
    • https://cdn.sqhk.co/sudagewas/hdhgam5/jafulojib.pdfIn PDF document text
    • https://cdn.sqhk.co/totudavomud/khhT75P/idle_air_control_valve_location_2000_honda_civic.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzutuse/cGzTjd2/rotten_tomatoes_best_movies_2018_top_100.pdfIn PDF document text
    • https://cdn.sqhk.co/vusopukov/ji39ija/wepage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459784/normal_601ccda9179ef.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/SUiikhh/lagu_slow_rock_hits_offline_download.pdfIn PDF document text
    • http://lofoporubatul.mygamesonline.org/35991793626.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/6428a20e-521e-42c5-ba86-d20e0b4ddb22/english_to_gujarati_offline_dictionary_free_download_for_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86c4bff9-283c-4050-a6ae-7551d2844489/ms_project_2010_download_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f19f080-551c-41ab-bb9b-44db899e7a72/survival_of_the_fittest_mobb_deep_download.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_off0000f312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF312 5668 bytes
SHA-256: bfadc663a890fd5ec2f553ab353723a61af8183bfd1bd604a101476beadd73aa
font_01_sfnt_off0001063a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063A 11780 bytes
SHA-256: 65e996892e995a33dcda97eb225090817d4b410c1f5b45dead8c7b4c257c3ca1

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