Malicious PDF — malware analysis report

Static analysis result for SHA-256 73d43bdad944c445…

MALICIOUS

PDF

82.7 KB Created: 2021-02-17 03:17:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 45cc138517d2331fe68ed1a82447687f SHA-1: d635238c96e2cafd7ecb43302427e90ac065438b SHA-256: 73d43bdad944c4458bd851b41befd5cb2b76e3d3c6d286edac5359ea17579321
196 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic indicates the document's content is designed to trick users with promises of prizes or funds, requiring them to interact with external links. The PDF contains numerous external URIs, with one prominent URL being https://baarspo.ru/wix?keyword=108ah+monopoly+pieces+2020, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://baarspo.ru/wix?keyword=108ah+monopoly+pieces+2020 PDF link annotation
    • http://brumbum2.xyz/holtz_and_kovacs_solution_manualxktx9.pdfIn PDF document text
    • http://1xbet-regi.site/46616332395acwgt.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/azhdhaI/chinese_fishing_nets_quotes.pdfIn PDF document text
    • http://pafiwuz.66ghz.com/animal_classification_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelemusib/gfjbuvL/37213760618.pdfIn PDF document text
    • https://tubolapibakosi.weebly.com/uploads/1/3/4/8/134872187/munabi.pdfIn PDF document text
    • http://velesvoyage.ru/28441157274s85g1.pdfIn PDF document text
    • http://kprovk.xyz/xofavosofepajojanutemzsxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://najaxobefirag.epizy.com/mamovutidapabejetogonu.pdfIn PDF document text
    • http://jibogifimot.epizy.com/simple_present_questions_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/2018_camaro_ss_1le_performance_parts.pdfIn PDF document text
    • http://naxamuj.epizy.com/47411367092.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/algebra_1_word_problems_perimeter_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/gimme_more_logo_quiz_answers.pdfIn PDF document text
    • http://fanevisexika.epizy.com/malayalam_christmas_parody_songs_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/wusedorufepozugutazevul.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1A 5604 bytes
SHA-256: 10bf4c9822c9273503e1c506c8416a7e0908616a2c828ade927f1b8b992d928b
font_01_sfnt_off00010d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0A 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00011598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11598 12120 bytes
SHA-256: e00722736837495df4897e061fda6aea2d440b673579eab7a0857772b1d4753d

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