Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d17ed91229264eb…

MALICIOUS

PDF

72.9 KB Created: 2021-02-17 17:03:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5f1287885bc1b290a32a3f2d32336eca SHA-1: 3b30aef3e8a09831aaddd1606c7e90afe662380a SHA-256: 1d17ed91229264ebcd255cb15525b28d2349541048ab23c6647fa61c816b9290
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain text related to a 'Harley davidson softail owners manual pdf', likely a lure to entice users to click the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=harley+davidson+softail+owners+manual+pdf In PDF document text
    • https://cdn.sqhk.co/xogovofofi/XhhXicQ/directv_guide_title_not_available.pdfIn PDF document text
    • http://topstop.site/juxibabugs9o30.pdfIn PDF document text
    • https://cdn.sqhk.co/puwipaneke/I4WTgdM/applock_pro_fingerprint_pin_mod_apk.pdfIn PDF document text
    • http://by-roof.ru/1490541106084pjk.pdfIn PDF document text
    • http://feedbacrnz.space/carnatic_music_books_telugummim8.pdfIn PDF document text
    • http://anrostore.ru/counter_strike_1._5_free_pcaroe0.pdfIn PDF document text
    • http://affilateapp.online/fapivamemikonesahu9el.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/cbOzphb/minecraft_skyblock_hypixel_resource_pack.pdfIn PDF document text
    • http://beliyden.xyz/snell_head_and_neck_anatomyaknb2.pdfIn PDF document text
    • http://bufo.online/tanifokevonubalofamiriz436e0.pdfIn PDF document text
    • http://wowitaly.pro/cbr_test_resultsi8bjw.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/nBZegcL/37041632150.pdfIn PDF document text
    • http://pimebujeben.66ghz.com/dahua_ip_ptz_camera_user_manual.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://wavujeg.epizy.com/paruvininipunapuzevasobid.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D1 5284 bytes
SHA-256: 4ab7ba006bdcdd1f7adcd4811ea0f0b9dd72b5e543a32b1fce5b5823652403ad
font_01_sfnt_off0000e2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C8 11024 bytes
SHA-256: 53ff2fb9beaa77ec6e2003877a73646b4f93c2d256e94eaaf3ec5ec90b93708b
font_02_sfnt_off00010817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10817 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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