Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a290ba2e4149a97…

MALICIOUS

PDF

91.8 KB Created: 2021-04-30 11:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c03d0df74377593bd975f002dc34e3d5 SHA-1: a30bce571f5201c04ddb20dfa5788dc77b964853 SHA-256: 8a290ba2e4149a97158f2cde83c5117e3a6b75662a5770d02c213a72831f57b4
134 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains multiple external URIs, with one pointing to a suspicious domain ('ponafet.ru') that is likely used for phishing or malware distribution. The PDF is also identified as a link farm on disposable hosting, suggesting an attempt to obscure the true destination or distribute various malicious links. No scripts were extracted, but the presence of external links and the overall detection indicate a malicious intent to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 https://ponafet.ru/strik?utm_term=infinix+note+3+pro+battery+price+in+pakistan PDF link annotation
    • https://cdn.sqhk.co/zuxosutuku/hiHnqid/hd_mirror_cam_reviews_2020.pdfIn PDF document text
    • https://piwifagipob.weebly.com/uploads/1/3/1/3/131379899/monoxi.pdfIn PDF document text
    • https://roguzemu.weebly.com/uploads/1/3/6/0/136018034/7605965.pdfIn PDF document text
    • https://retujesa.weebly.com/uploads/1/3/4/5/134529196/2004883.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/hhhg1hh/crowd_cartoon_picture.pdfIn PDF document text
    • https://polaposegit.weebly.com/uploads/1/3/4/5/134591324/roselifameted.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CsqibHb/duzibadufefubonatamarukez.pdfIn PDF document text
    • https://boloxekovo.weebly.com/uploads/1/3/2/6/132681585/9620760.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/526949ff-a49e-4726-9ca6-9eac877b9440/what_is_the_price_of_large_letter_stamp.pdfIn PDF document text
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_433c6b07a24f4b078366cd28265cafa9.pdf?index=trueIn PDF document text
    • http://gulopajekojof.epizy.com/vavikowir.pdfIn PDF document text
    • https://21036261-01f9-4725-a342-2b8b08d10099.filesusr.com/ugd/d0cbc4_5e7b6a13932e4a098f2b0ff176632838.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2290e00-bcb2-46db-a9ad-02aa67b39303/munizexirimud.pdfIn PDF document text
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_11fa8765d43c492187f6b69998160977.pdf?index=trueIn PDF document text
    • http://xamupufe.epizy.com/topejuwixira.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10471 5452 bytes
SHA-256: a7b7c1843591229536afe76156b514b53179cbaca04c9d209167e8346cf140f0
font_01_sfnt_off00011718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11718 2316 bytes
SHA-256: 026745fd21f6b84ab6802917bbe7ed3c7eee1efd6639876232aefe6a6dd411bb
font_02_sfnt_off00012173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12173 12664 bytes
SHA-256: 9ddbcdb5bb7ba712317c155903d4239db8d367963e89b74ebfc9bf2c0598c5a0
font_03_sfnt_off00014c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C4B 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61