Malicious PDF — malware analysis report

Static analysis result for SHA-256 9877785e6d68a866…

MALICIOUS

PDF

79.6 KB Created: 2021-03-15 12:59:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dee96d38ae63f85d503132131b62f10e SHA-1: 65cfa90afb53838fb8589c859acfb077fcfebd4c SHA-256: 9877785e6d68a866fdc315fa7b1b19f5fcea82f071e0544bdf918fa064d362e3
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a suspicious domain, disguised as information about car seat expiration. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of external URIs and the document's deceptive content point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/strik?utm_term=how+to+find+out+if+my+car+seat+is+expired
    • http://saleproducts.pro/modoworanekowuduvanevubzonia.pdf
    • http://yellownatural.space/free_commandos_40d4fz.pdf
    • https://cdn.sqhk.co/pimepojuti/ijt6gia/jimumabasesufog.pdf
    • http://vashe-zdorovie.xyz/t_mobile_prepaid_plans_25k9523.pdf
    • https://cdn.sqhk.co/kakapoxavu/hd3gfsF/42712006504.pdf
    • https://cdn.sqhk.co/wepigosogo/Widwgi3/bonusejagodujotiwisi.pdf
    • https://cdn.sqhk.co/ronofumito/shcibjh/tropico_de_capricornio_mapa_argentino.pdf
    • http://getcreditcheck.info/bitnami_wordpress_download_macsuqv3.pdf
    • https://cdn.sqhk.co/vemonososepa/jcidheh/fall_guys_game_engine.pdf
    • http://thiswaytovogue.com/how_to_program_comcast_remote_to_my_samsung_tvd96lk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/45be793b-3384-41d1-a1cf-4887249152b2/god_is_a_matchmaker_by_derek_prince.pdf
    • https://uploads.strikinglycdn.com/files/372498f1-15a2-4642-8580-7fd49036a594/fisher_price_infant_to_toddler_rocker_safe_to_sleep_in.pdf
    • https://uploads.strikinglycdn.com/files/796af06f-2364-4e78-b02e-107c7be1bf88/jeziperemigo.pdf
    • https://uploads.strikinglycdn.com/files/370c44f9-5a47-474c-8920-a3d5d739e76c/what_is_the_you_lost_the_game_meme.pdf
    • https://uploads.strikinglycdn.com/files/de6b648b-3ea8-4d72-b253-c3903696c72f/murray_snowblower_parts_manual.pdf
    • https://uploads.strikinglycdn.com/files/a149d71b-a1c1-4952-9495-67a91e5e488d/hp_officejet_8600_ink_system_failure.pdf
    • https://uploads.strikinglycdn.com/files/d422ff20-2ca9-4342-8e96-c1faa87f60a7/cissp_all_in_one_latest_edition.pdf
    • https://uploads.strikinglycdn.com/files/4b96ac04-d67d-4e18-b18b-6a39a872036d/a_link_to_the_past_switch_hd.pdf
    • https://uploads.strikinglycdn.com/files/d7da6bc2-8c22-416f-9a13-06598ce93e78/matlab_exam_questions_and_solutions.pdf
    • https://uploads.strikinglycdn.com/files/9849bed3-35c4-493f-b3bb-52afb2ba7411/what_is_the_plot_of_on_the_sidewalk_bleeding.pdf
    • https://uploads.strikinglycdn.com/files/7c2b2bb4-4138-4219-a544-cd0de6b84cdf/how_to_connect_two_jbl_flip_4s.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f947.bin
aae6b108fce0ff1732ab37f15fe2601bb4ca923c302ea5563797e170ba7b1ab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF947 5492 bytes
font_01_sfnt_off00010bfd.bin
f6d60f70141f97a89a1965d6fe65d9ffde6b3085092552b88e795f38edfd5ddf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFD 10824 bytes

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