Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f356720e49ba671…

MALICIOUS

PDF

899.4 KB Created: 2021-05-13 10:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 73909b2cc8a1a1a7a4ea080ad031ec81 SHA-1: 3e40058d2d37a2b68da8afc37e53042ad9c762d5 SHA-256: 7f356720e49ba671a9b25197041b1dfd7b48ecf2823fffe7f1a4f7d7d41f0775
66 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to a 'study guide'. The presence of an external URI and the ClamAV detection strongly indicate a phishing attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4679

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://lozipotod.ru/strik?utm_term=the+mingling+of+souls+study+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404112/normal_5fd286baa7b43.pdfIn PDF document text
    • http://azakalaza3.xyz/medical_pharmacology_books3epc8.pdfIn PDF document text
    • http://nijepatexosanus.medianewsonline.com/brahmanaspati_suktam_sanskrit.pdfIn PDF document text
    • http://calipshatngaccs1.xyz/is_there_a_voice_recorder_on_iphone_10tbie9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373776/normal_5ff0dad3820b8.pdfIn PDF document text
    • http://khareedforosh.com/9578005096266c0l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385014/normal_60568b1ae6541.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417662/normal_5fed54a092e80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446165/normal_600d7d5d8e10d.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/begijufadi/92385591337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55f26fb2-7840-4141-be52-0387b91fd9a1/4_pics_1_word_level_265.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/microsoft_outlook_for_mac_mojave.pdfIn PDF document text
    • http://gagonunanu.epizy.com/viliverolisokijo.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/john_deere_2650_steering_problem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b52bdaf-7db9-41e5-8515-5cee403a4587/55807695873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77875672-99ac-4905-b13b-4982177bdece/50938344253.pdfIn PDF document text
    • http://fufuzadawefor.onlinewebshop.net/73561162495.pdfIn PDF document text
    • http://megigezorozo.atwebpages.com/fundamentals_of_computer_programming_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9e32501-5b78-4547-a3ef-6ea001932d9c/what_is_the_message_of_letter_from_birmingham_jail.pdfIn PDF document text
    • http://lufafutogixafu.rf.gd/bovopunoradugav.pdfIn PDF document text
    • http://titarejidawe.epizy.com/wellthy_therapeutics_reviews.pdfIn PDF document text
    • http://bigazixipiw.rf.gd/longhorn_beetle_bugguide.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/dirt_devil_easy_lite_7.2v_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/kizuxugiparilizilupopuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2485b7a4-08bb-4342-a73c-bac4cd39e301/78467661425.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_off000dbcb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCB1 5068 bytes
SHA-256: 5fc510a3ee70e113045860eb8ab7c8489b3bab70c52958c03f8e07e17c82f442
font_01_sfnt_off000dcde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDE9 13216 bytes
SHA-256: 649620d85ae435d7ba7f543d35d81e7505101e7f7ba79eb77ec7675c76a724e6

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