Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ff3b153c6eb7e8…

MALICIOUS

PDF

76.4 KB Created: 2021-04-22 00:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 64e18b1d151e52dafe3ec5f754089a16 SHA-1: 2a02e2f078604651664e2a5a9c25b511b8357f10 SHA-256: 80ff3b153c6eb7e8ed3c5bf71f39c05856cec53ab3d5533cdffc9fa0694d3729
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to various domains, many of which are flagged as part of a link farm on disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a tactic to distribute malicious content or phish for information. No scripts were extracted, but the structure and URL distribution are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=what+if+cast+2010 PDF link annotation
    • http://pugalibapuf.iblogger.org/maze_of_bones_book_trailer.pdfIn PDF document text
    • http://ufenmac.com/teenage_chore_list_templates0h135.pdfIn PDF document text
    • https://cdn.sqhk.co/latipizi/QjjLTre/63404582914.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/76308693029o7p8d.pdfIn PDF document text
    • http://look-hotel.com/feliz_navidad_chords_ukulele_in_cnwa7s.pdfIn PDF document text
    • http://helpforteam.com/kinawixepuwowigomepegabk9hrt.pdfIn PDF document text
    • http://woodbonus.net/craftsman_wet_dry_vac_6_gallon_filter8nbi9.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/c9hjhaI/legit_online_shopping_sites_usa.pdfIn PDF document text
    • http://naderuromopuru.22web.org/nokedima.pdfIn PDF document text
    • http://ketuzel.22web.org/create_iam_policy_cloudformation.pdfIn PDF document text
    • https://cdn.sqhk.co/winogolelog/JhcuYie/top_up_free_fire_murah_pulsa.pdfIn PDF document text
    • http://changely.club/lutameql0bg.pdfIn PDF document text
    • http://gufutaca3.xyz/nimereripogemurabotolaji1zfmz.pdfIn PDF document text
    • https://cdn.sqhk.co/sexifirume/JJxji0d/voluntary_redundancy_letter_template_employee.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/2415a103-cee6-4f1b-b325-36e36cfd3883/gibik.pdfIn PDF document text
    • http://batilirilalu.rf.gd/goal_setting_sheets_for_athletes.pdfIn PDF document text
    • http://pikididubemet.epizy.com/bekaboo_web_series_episode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9002b4b3-5dd7-41ec-8929-1c4b48c80950/altered_carbon_season_1_episode_7_review.pdfIn PDF document text
    • http://xekurenu.rf.gd/voladebu.pdfIn PDF document text
    • http://bizemilibudog.rf.gd/zobusomogevogatow.pdfIn PDF document text
    • http://dekegafazuwad.rf.gd/79916923577.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_off0000ed89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED89 5180 bytes
SHA-256: b91268d2b07294ec6dbb39d35afcf891b28874fe84e2d6277123795f8398673c
font_01_sfnt_off0000ff3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3D 11000 bytes
SHA-256: f4a806dca89c703f4fbb91788ad9fcaec6a48673331821f33761690be6d73f9d

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