Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b2497de363c1240…

MALICIOUS

PDF

98.1 KB Created: 2021-03-24 18:31:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c9c261bfe3825746e6992ba431238543 SHA-1: 5472a70c7ee2c7bb34c140a5b555543c35137b86 SHA-256: 4b2497de363c12405f351aaf33709b2b2cc301e76cf757258dfb89b6dbe3e4ca
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in SEO link farms to manipulate search engine rankings or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. The presence of embedded URLs suggests an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wix?keyword=nurses+pocket+guide+apa+citation PDF link annotation
    • https://cdn.sqhk.co/tomubozes/eijWjjr/national_football_championship_2020_live_stream.pdfIn PDF document text
    • https://cdn.sqhk.co/zativojor/ecG3Ht7/monkey_go_happy_6_level_10.pdfIn PDF document text
    • http://easybranding.org/xofuloxa8ktrq.pdfIn PDF document text
    • http://manuximaxemeje.scienceontheweb.net/86182487113.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/cOWFVQd/short_stories_in_english_olly_richards.pdfIn PDF document text
    • http://ranking-se.com/levejunuvexelumukir8l.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/bissell_little_green_proheat_instructions.pdfIn PDF document text
    • http://filuxunokenobud.mygamesonline.org/animus_anima_jung.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_9df4932f73594c2eb3719199ef4d5ca3.pdf?index=trueIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_229f37a575bb4450b0f688613161876f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pazatuv/92447242265.pdfIn PDF document text
    • http://kuwitabetegipo.myartsonline.com/learn_python_3_the_hard_way_2020.pdfIn PDF document text
    • https://a2fe464c-28d1-4db8-bb2d-552ad9bc2f4d.filesusr.com/ugd/941bb1_601b6af188484251b8a8ebca16974aef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/vugimilizekufefoni.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/boy_baby_shower_games_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/neluwisevaxuvuti.pdfIn PDF document text
    • http://pojoviraxerojo.myartsonline.com/firosedu.pdfIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_3cd5860ee3014d1f800293ed1d0c1856.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/pididifetubepiguwazanafi.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/bestwap_ringtone_iphone.pdfIn PDF document text
    • https://82c1a4a6-0aea-44ab-842b-07cb5bdde860.filesusr.com/ugd/aafee9_d180599cc9cb45168da5c7bf88fc3be3.pdf?index=trueIn 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_off00013eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB3 5244 bytes
SHA-256: 85f1f556ee99f51c382d83ec3642364e22f4d336081efd7a9847cbeee3a1b459
font_01_sfnt_off000150a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150A0 12508 bytes
SHA-256: 6120645bc93b62406c4a8ad7dd141fd80537f0b3d09c054ec27a0db337e0fa4a

Open this report in the interactive analyzer, or submit your own file for analysis.