Malicious PDF — malware analysis report

Static analysis result for SHA-256 b21da674f8328070…

MALICIOUS

PDF

78.1 KB Created: 2021-02-13 16:30:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: eec85e071df4c56b6db98dbb1464ad2f SHA-1: 6f39fa335a88ca343b40a7f7339a6a133d7d0126 SHA-256: b21da674f832807015ddd5dc144d9a9977d781d2463629ca56f98b02b7927d0c
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many hosted on disposable domains or link farms, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains metadata related to its creation, and the presence of embedded URLs indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/wix?keyword=the+giver+study+guide+answers+novel+units+inc PDF link annotation
    • https://cdn.sqhk.co/somisafeg/jgphcja/art_of_war_book_summary.pdfIn PDF document text
    • http://sks-expertiza.ru/fiwesugotonoxagakasisxkwip.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.website/gosexepenanuduwotepamixctmdr.pdfIn PDF document text
    • https://gozawufi.weebly.com/uploads/1/3/1/3/131398332/4610649.pdfIn PDF document text
    • http://speak4pro.com/bizudinakuwufx4a6.pdfIn PDF document text
    • https://cdn.sqhk.co/nazopekujavi/jfgcIie/xekexetupuxalakedeniwanaw.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/aZ303if/36815720443.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/XYB5kji/lethean_water_meaning.pdfIn PDF document text
    • http://tonalemeketav.66ghz.com/xomirewuxikebubujotatu.pdfIn PDF document text
    • http://vorecan.fun/bonus_sheet_format_excelwne99.pdfIn PDF document text
    • https://bovikobugekut.weebly.com/uploads/1/3/0/7/130775803/3865676.pdfIn PDF document text
    • http://xigotazuwal.iblogger.org/lavixasa.pdfIn PDF document text
    • http://specialsale.info/ejemplo_de_bosquejo_de_investigaciondagsb.pdfIn PDF document text
    • https://gebejisidimi.weebly.com/uploads/1/3/5/3/135302949/8408722.pdfIn PDF document text
    • https://poxagubojawi.weebly.com/uploads/1/3/1/4/131482812/lirep.pdfIn PDF document text
    • http://romeoplanet.club/19267635149d1mo7.pdfIn PDF document text
    • https://mebotorafegamor.weebly.com/uploads/1/3/0/7/130739377/lenefafazapifuke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kagokonutuvep.epizy.com/happy_birthday_cake_with_name_rahul.pdfIn PDF document text
    • http://nilidax.epizy.com/adobe_reader_portable_free.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_off0000e8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C1 5288 bytes
SHA-256: 5f3f78c0d6971ef8945aeb226f839e560f0be33c95c1112b5567dd52d9bffd79
font_01_sfnt_off0000fad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD2 9848 bytes
SHA-256: 309e26a08e78a992f0f258685fecf2cfe74c3b1d4e66c5cc71a1ccc4392236bc
font_02_sfnt_off00011c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C81 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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