Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1722d60f63ab188…

MALICIOUS

PDF

70.4 KB Created: 2021-02-10 17:47:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3db73b5b87ffa9a6b8d0932a85538891 SHA-1: e44bcdc7848b3a8ee985c645754a3d92c7e32f28 SHA-256: e1722d60f63ab1886ef2ce07c8104afb8d2cd64560c5ad40040e1f5ae9c97a5e
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though heavily obfuscated, contains text related to 'Amedspor formas1 sipari_', suggesting a lure for an order confirmation. The presence of numerous external URIs, including one pointing to 'jacksth.ru', strongly suggests the document is designed to redirect users to a malicious site for further exploitation or credential harvesting.

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://jacksth.ru/aws?utm_term=amedspor+formas%25C4%25B1+sipari%25C5%259F
    • https://rigitugatelimo.weebly.com/uploads/1/3/4/1/134131632/defajepofumisufujiru.pdf
    • https://static.s123-cdn-static.com/uploads/4501361/normal_600154a2e226b.pdf
    • http://gimakelodikovij.iblogger.org/xikogejoxudevadawo.pdf
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/ridagufep_kawavajovu.pdf
    • https://cdn-cms.f-static.net/uploads/4416790/normal_6023b8d06cb68.pdf
    • https://nesipemuwazona.weebly.com/uploads/1/3/4/8/134881126/dekodewabikevawasuva.pdf
    • https://cdn-cms.f-static.net/uploads/4401555/normal_601651da75977.pdf
    • https://kobirozo.weebly.com/uploads/1/3/4/8/134846370/fotomexu-nowebugawebal-desagi-piwadus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wozoxub/google_chrome_spell_check_dictionary_failed.pdf
    • https://s3.amazonaws.com/wegemebufojafak/cashflow_101_game_rules.pdf
    • http://pikigefunix.epizy.com/ctv_kitchener_news_reporters.pdf
    • https://s3.amazonaws.com/suxuzubojut/61073850422.pdf
    • http://redikubegoda.epizy.com/update_android_box_x96.pdf
    • http://gozadowosib.rf.gd/74212394740.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d559.bin
7d7821145efe6507711724135c6d6e05a8f0a36e8fef00d08f60f2ee3a49c999		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD559 5424 bytes
font_01_sfnt_off0000e73a.bin
a24d91aafd3801a59f2c9b50ff89d735d27fb02c7406c87e25909fe0fd6b6525		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE73A 11148 bytes

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