Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b5584da3899f3f…

MALICIOUS

PDF

125.6 KB Created: 2021-03-24 21:28:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 1a18715cd32d06d0a80a29c912fec6bb SHA-1: 56903192d90f9ebf63f88f3a6d139443eb42b1a5 SHA-256: 98b5584da3899f3f09a41b78b2ada5c5e5637aa508a8fcc3fe5e5b5c265760c4
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are SEO-optimized and point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The primary URL, https://ponafet.ru/wix?keyword=vishnu+sahasranamam+pdf+sanskrit, suggests a phishing or scam attempt disguised as a search result. ClamAV detection and ML classification further support its malicious nature, flagging it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=vishnu+sahasranamam+pdf+sanskrit PDF link annotation
    • http://bamiluzigu.mygamesonline.org/what_does_fluency_mean_in_math.pdfIn PDF document text
    • https://duzunadi.weebly.com/uploads/1/3/0/9/130969775/3666473.pdfIn PDF document text
    • http://vajokopopozikem.medianewsonline.com/barriers_to_innovation.pdfIn PDF document text
    • https://sujoxiwu.weebly.com/uploads/1/3/4/8/134879933/93ec14ae7f.pdfIn PDF document text
    • https://vosikobogoj.weebly.com/uploads/1/3/4/2/134235386/12a67fb0e38c680.pdfIn PDF document text
    • https://welirupew.weebly.com/uploads/1/3/4/6/134662060/zosumu_baxodav_kanebasil_neposu.pdfIn PDF document text
    • http://vizimuvorogo.22web.org/shark_sonic_duo_pads_uk.pdfIn PDF document text
    • https://zimavilagapiwe.weebly.com/uploads/1/3/2/7/132712623/a8dbb.pdfIn PDF document text
    • http://fakoxime.iblogger.org/soft_starter_allen-bradley_smc_flex_manual_portugus.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/56960400729.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/wakujuxema.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/balanceamento_equaes_quimicas.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/96046686842.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/information_report_examples_stage_3.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/monunesupuzozoma.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/typhoid_test_report_normal_range.pdfIn PDF document text
    • http://fumibilulad.atwebpages.com/zirujogajo.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/bmw_financial_report_2016.pdfIn PDF document text
    • http://wepaxilex.epizy.com/subikil.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/chemiosmosis_atp_synthesis_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/wukufofam.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00019869.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x19869 27928 bytes
SHA-256: 78b05853c0f2b59d4d334bc760d8de886f49aeeb2b1593246c020dfabb7addaa
font_00_sfnt_off000141d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141D0 5276 bytes
SHA-256: 2b26b4a69be1fecd9545b7088eac956d1cac080521a42f7644222e810cb686e2
font_01_sfnt_off0001539a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1539A 3772 bytes
SHA-256: b9b49a3c453c53986d7a61d4291ac5a87065d82ff96be43ef0dca6427e6dc540
font_02_sfnt_off00015f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F3E 10716 bytes
SHA-256: 7c6ae73ddbb8518e5f80f3844809d5cbd5cf9e55f53151b697d33ebe2ba7d9af
font_03_sfnt_off00018310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18310 16172 bytes
SHA-256: 6e699eab9a6fef16b3ea923df7b93ce1c5cbd97c7a594d359cd98c90be4a35f1

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