Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6147af6591a6cd…

MALICIOUS

PDF

79.0 KB Created: 2021-02-24 12:30:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7fe04f04bc733671fac5445079372a0c SHA-1: 89f41adbc91cf4e464705bf6b36b0a034f6681c9 SHA-256: 5a6147af6591a6cd7b24481afdea5de7678ac379de7f78d279a516d527e7bf58
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially malicious sites, likely for phishing or malware delivery.

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://seumenha.ru/wix?keyword=chi+late+breaking+work+2020 PDF link annotation
    • https://cdn.sqhk.co/noxisoture/h4jhFUq/88033442498.pdfIn PDF document text
    • http://nujuxogo.iblogger.org/kadizix.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/jvhfidn/shark_addon_minecraft.pdfIn PDF document text
    • http://ponopawux.iblogger.org/default_dance_flute_sheet_music.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://judejelalub.rf.gd/greensleeves_guitar_sheet_music.pdfIn PDF document text
    • http://javozajesaretu.epizy.com/tawemubotovazutetob.pdfIn PDF document text
    • http://lepefefila.epizy.com/fegarufajuxegar.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/darupobetavuwazobezoj.pdfIn PDF document text
    • http://tomenederixi.epizy.com/76308853630.pdfIn PDF document text
    • http://kedekivotizera.epizy.com/arithmetic_sequence_and_series_worksheet_answers.pdfIn PDF document text
    • http://fadifisevak.epizy.com/gumegezukakexebu.pdfIn PDF document text
    • http://jenigaseze.epizy.com/jojapozuxedoreruxolewamub.pdfIn PDF document text
    • http://folapalej.rf.gd/toro_ccr_2000e_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/96320880422.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/59044226095.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/free_low_carb_diet_plan_to_lose_weight.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4D 5152 bytes
SHA-256: 3dc7691e5813ce2d5ee1751a889b72484684fd529c0ce7be473c07a3ceace7a1
font_01_sfnt_off0000fbd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD9 10796 bytes
SHA-256: affb50bd49430a6fc924cc20425674367e6f24cbec6138afe88509b5577a64f9
font_02_sfnt_off000120c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C6 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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