Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ba3cd9c7f5d7a7…

MALICIOUS

PDF

76.9 KB Created: 2021-02-10 21:13:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 9ca41f7731dad0904b799727e1941035 SHA-1: 5796178335bf675f4c63970c5065e0e8b6f77802 SHA-256: 68ba3cd9c7f5d7a7148b80e8cd18bf1ddf501979e0c1e4dbb2446d78e7608106
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and the ML classification strongly support a malicious PDF attack pattern.

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 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://jottigo.ru/aws?utm_term=characteristics+of+leadership+pdf PDF link annotation
    • https://petugaxuw.weebly.com/uploads/1/3/5/3/135397026/65ca5a2654.pdfIn PDF document text
    • https://cdn.sqhk.co/doginifa/igcEiea/xofenadexu.pdfIn PDF document text
    • https://cdn.sqhk.co/bodavadu/oziiahf/mesozokezasepajebevugib.pdfIn PDF document text
    • http://famavusejozeroj.iblogger.org/81979729012.pdfIn PDF document text
    • http://lewodazegozi.iblogger.org/irmsa_2019_risk_report.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lufusemeg.epizy.com/aasld_guidelines_psc.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/44345968582.pdfIn PDF document text
    • http://xodupope.epizy.com/flowers_for_algernon_progress_report_14_summary.pdfIn PDF document text
    • http://raziwisubuza.rf.gd/odia_dj_album_song_2018.pdfIn PDF document text
    • http://kedipakusox.epizy.com/rukiliwoxamovizaxe.pdfIn PDF document text
    • http://wexereza.rf.gd/nutritional_information_for_1_2_cup_blackberries.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/capital_and_reserves_on_balance_sheet_uk.pdfIn PDF document text
    • http://gajikefobazute.rf.gd/51528460098.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_off0000f1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E2 5148 bytes
SHA-256: b26b4539e876a493b88dc0cbd91398ae94962a13531af64818c7359b7ca4345f
font_01_sfnt_off00010359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10359 10348 bytes
SHA-256: 18fee7244e4d866683a0c685fc3a3996b4961cdadc0021334123a5153e1fb120

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