Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c17c9a5226096c7…

MALICIOUS

PDF

84.4 KB Created: 2021-05-12 06:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 971befbeccb23a6710e22c283e7f4cc8 SHA-1: df386f7b08178df21c76aee3f4e4cafab8cb5250 SHA-256: 7c17c9a5226096c71a7b565d7d43ceb5d57e84412538a0193ccc71adbaa24fe1
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, suggesting a link farm or redirection infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt, likely using embedded JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://xizesagig.iblogger.org/janapada_geethalu_ing_audio_songs.pdf
    • https://cdn.sqhk.co/wotudasigeb/b0yHAgh/94007291934.pdf
    • https://cdn-cms.f-static.net/uploads/4377679/normal_60589521869d1.pdf
    • https://cdn.sqhk.co/xewazezikufi/fhhvnbI/facebook_inc_stock_symbol.pdf
    • https://cdn-cms.f-static.net/uploads/4389090/normal_6044fcba0e0ee.pdf
    • https://static.s123-cdn-static.com/uploads/4492529/normal_6000fe97c5c56.pdf
    • https://static.s123-cdn-static.com/uploads/4473053/normal_5ffd5936a5787.pdf
    • https://cdn.sqhk.co/kinibemazoz/cjhiajc/dentures_and_demons_walkthrough_chapter_1.pdf
    • http://fafabil.getenjoyment.net/boundaries_in_relationships_worksheet.pdf
    • http://xabidakidu.iblogger.org/50012696658.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://feedproxy.google.com/~r/wb/ENAH/~3/mO-5lVq97NI/wb?keyword=2001%20honda%20rancher%20350%204x4%20carburetor
    • http://teluroluxeterez.myartsonline.com/jituzaxasolixatadiw.pdf
    • http://femixuduj.rf.gd/78761633093.pdf
    • http://pegalisijeg.epizy.com/excel_two_sheets_side_by_side.pdf
    • http://fadifisevak.epizy.com/zidituvogasaxavubava.pdf
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_476f1eaabb61495f8a5a358edc2bf9bb.pdf?index=true
    • http://kotejij.epizy.com/9118287930.pdf
    • http://bipeturam.epizy.com/wilewewakasomakozidojov.pdf
    • http://xifeloj.onlinewebshop.net/51304757555.pdf
    • http://meludakezadew.epizy.com/xamagukorasuliwozimibe.pdf
    • http://xilimagokenojik.rf.gd/eos_rebel_t5_manual.pdf
    • https://e40da922-b0e4-44be-9878-2d4898ccab21.filesusr.com/ugd/3a38e0_f0fe042f825543fe89365b27201fba3d.pdf?index=true
    • http://nusagimedejaj.rf.gd/poe_scion_guide_deutsch.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcf3.bin
fd39d65b1c1f7a44a03f61fb564d44b6eb3fc83ce575f1091c50ae7da8216269		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF3 5468 bytes
font_01_sfnt_off00010f72.bin
d7bee67ca4a990990fba0a0565de2a6e714746de5b84ca30cb197a69c6fd04c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F72 11252 bytes
font_02_sfnt_off000135b4.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135B4 4324 bytes

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