Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab673cd6b734a3ef…

MALICIOUS

PDF

77.4 KB Created: 2021-03-08 07:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 520b82434d38c12669d31cb654c65430 SHA-1: b0000a5ea49abd2643100ae6c614fc83506ed2bb SHA-256: ab673cd6b734a3ef02f53601c0a7c3a4714878df1e508a39b60cc49f1f2f4ceb
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to SEO-farmed domains. The heuristic PDF_SEO_LINK_FARM indicates a mass of external links, and the ClamAV detection as Pdf.Phishing.Trojan suggests malicious intent. The embedded URLs, such as 'https://leonvi.ru/strik?utm_term=introduction+to+biblical+interpretation+3rd+edition+pdf', are likely used to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/strik?utm_term=introduction+to+biblical+interpretation+3rd+edition+pdf PDF link annotation
    • http://zobuzuw.iblogger.org/bedegafu.pdfIn PDF document text
    • http://kafalukuwemi.mygamesonline.org/the_fountainhead_ayn_rand_quotes.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/grundig_s350dl_antenna.pdfIn PDF document text
    • http://verification-help.com/72894396714dpwlm.pdfIn PDF document text
    • http://gallery-shop.site/zujomon6uam.pdfIn PDF document text
    • http://semowatuk.iblogger.org/princeton_review_mcat_course_extension.pdfIn PDF document text
    • http://gufurebu.medianewsonline.com/monster_vault_4e.pdfIn PDF document text
    • http://bowenaf.22web.org/face_3d_model_blender.pdfIn PDF document text
    • http://creditreportus.info/how_to_do_a_foreign_exchange_programoump5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_032df54af44046b2a0e67d0ebee2abc0.pdf?index=trueIn PDF document text
    • https://f62823ea-e863-4eb7-bd7c-e3bac0139ff1.filesusr.com/ugd/8c639a_6d890675ba1e43b08bfc48cce4a3926d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kafises/edmentum_chemistry_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/red_smooth_mini_dachshund_puppies.pdfIn PDF document text
    • http://wazikaje.rf.gd/pastest_mrcp_part_2_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/facebook_videos_iphone_app.pdfIn PDF document text
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_64daae11fd304ba48b4109a00d4dbbf9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gomakobez/can_t_open_ics_file_on_android.pdfIn PDF document text
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_ac42310bbff44c1693b4006736740b3c.pdf?index=trueIn PDF document text
    • http://nujugeteteda.myartsonline.com/how_to_find_height_of_a_cuboid_formula.pdfIn PDF document text
    • http://xirexadugimog.atwebpages.com/83055113280.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/40402650212.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/bridge_over_troubled_water_guitar.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/pazaradomow.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/leave_without_pay_approval_letter_template.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_off0000f1bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BC 5212 bytes
SHA-256: c10d561181320296080b74ebb0db39ef7dcbe1bc620843127967f0e98a5256dd
font_01_sfnt_off00010380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10380 10644 bytes
SHA-256: 464f2150975fba8e1a66ef9a9d8216597c748cacdfb550eee8567027e8bf6caf

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