Malicious PDF — malware analysis report

Static analysis result for SHA-256 a661294fa88cf19f…

MALICIOUS

PDF

104.9 KB Created: 2021-02-28 23:28:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9a3d043a17260608f3a1671008076f75 SHA-1: 7a903d686ae400c5b2c7a4f74e928180d85a4a32 SHA-256: a661294fa88cf19face3c11c3bc47c675fa23110e7c774adfdae957a484ac919
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=dante%2527s+paradiso+map PDF link annotation
    • http://xiwesesakuvel.medianewsonline.com/how_to_program_a_clicker_garage_opener.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/electricity_and_magnetism_worksheets_8th_grade.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/17909268433.pdfIn PDF document text
    • https://lanapovo.weebly.com/uploads/1/3/1/4/131437145/nimozovijabad.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/how_to_extract_cystic_acne_at_home.pdfIn PDF document text
    • https://xabodalemebom.weebly.com/uploads/1/3/1/3/131381489/7a6c80.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/vetepesokero.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/does_fairy_tales_lice_prevention_work.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/folexapurilowe/84300835243.pdfIn PDF document text
    • http://rewuwuja.onlinewebshop.net/47464645430.pdfIn PDF document text
    • http://bapinusajix.rf.gd/gilatomikakosu.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/blast_furnace_osrs_gold_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/how_much_does_an_animator_make_per_hour.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/56761164228.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/26900203932.pdfIn PDF document text
    • http://rewezaxow.epizy.com/event_after_action_report_sample.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_off00015e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E88 5104 bytes
SHA-256: ff0e7a5bc01883d1c4c217db0fe79095465f3cb88f180cfb768f763a69646c3f
font_01_sfnt_off00016fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FD7 11932 bytes
SHA-256: 009aa0a12583b221f114b5b8ffe2617c88341465a8ca355d87b6f7e1574dbd1d

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