Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c5e8ee39951da5…

MALICIOUS

PDF

79.5 KB Created: 2021-04-14 07:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 92d91bb0b733327755ec0d8150a632d9 SHA-1: 67fe0ab14f6c00909ed33df133c217ed286ab9ae SHA-256: 89c5e8ee39951da5d2c10bf5b11743c0ecb03cbc50fa8b9fd3a8e0b8ab93fb38
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, which is also listed as an IOC. The ClamAV detection and ML classifier strongly indicate maliciousness, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text that appears to be a lure related to a video game, suggesting a phishing or social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=can+you+get+goat+simulator+on+ps4 PDF link annotation
    • https://cdn.sqhk.co/nelufebo/Kiihhgf/happy_birthday_pics_for_friend.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/jj3hijf/50422680634.pdfIn PDF document text
    • http://baliferifopiz.mypressonline.com/32846229325.pdfIn PDF document text
    • http://tamogulaganero.scienceontheweb.net/82812130375.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/rujimidujek/ereading_figurative_language_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03737a22-d623-45a6-b2ee-98bddb82aa3a/pen_is_mightier_than_the_sword_phrase_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/96835566499.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/motorola_g6_play_dual_sim_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a99ad7b-a00f-4d72-9e13-e173be860aaa/60990203191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c50cd34-4584-4eca-969a-0ffbd703b251/options_trading_books_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/what_is_burger_king_deal_of_the_day.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/8322178495.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/super_dark_womens_sunglasses.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/the_curious_baby_elephant_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/nafodidijipexovesamil.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/incline_bench_press_form_dumbbell.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/pdf_antropologia_uma_introduo.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_off0000f5a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A5 5236 bytes
SHA-256: 04da77c1f4cfa902c0b0f444fa8190f7a575ded834f63a6ff98696f9c9dcaba2
font_01_sfnt_off0001076f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076F 12252 bytes
SHA-256: ba6e6f90dada57f1a78d0b588dfc6db6deaa024c3348bd974b5d837906993064

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