Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e5e02866507e70…

MALICIOUS

PDF

73.2 KB Created: 2021-04-03 23:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 03eb1415dfda193450b31db1bcd1e33b SHA-1: eb0081cbefe2e8878add9e2cbce03c33f58b2248 SHA-256: 35e5e02866507e70f2822b107143a07fcce7a47d3324c304256cf68ec7aee496
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link T1059.007 JavaScript

The PDF contains multiple links to external websites, with at least one identified as a malicious redirector. The heuristic 'SE_MFA_LURE' indicates the document's content is designed to trick users into providing sensitive information, such as one-time codes or MFA approvals, consistent with credential phishing. The presence of embedded URLs and the nature of the lure suggest an attempt to harvest credentials or session tokens.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://dafemum.ru/123?utm_term=uidai+aadhar++open+password In PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/9uGhaMQ/nosekezolafesetotovizonob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450638/normal_5ff755d244fd5.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/hgTucgd/zitisaluviniborasinub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445106/normal_605f98bd33299.pdfIn PDF document text
    • http://bonus332.site/595345611557obwf.pdfIn PDF document text
    • http://d-youtube.com/new_horizon_mobile_home_parkbi7gm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382190/normal_6008ac1d37336.pdfIn PDF document text
    • http://giftcard-sale.store/44089171108iv429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446285/normal_5fe8f31ccbf68.pdfIn PDF document text
    • http://vitalia-transports.com/tawavajutotx4vb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372723/normal_6008f14088c28.pdfIn PDF document text
    • http://bekokasutam.22web.org/adobe_photoshop_cs5_setup_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486552/normal_6028b7e9e8ba0.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/lgiSghS/mapomuragejaru.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/5jfjiaS/foil_turning_3d_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dojopugoput.epizy.com/bodybuilder_hd_images.pdfIn PDF document text
    • http://gokonef.epizy.com/lowetojatixebusosope.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/array_object_in_javascript.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/nerat.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/ethos_blaze_farm.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_off0000e315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE315 5096 bytes
SHA-256: 55e01e33359eaa7b4badfe08fa19db30864dfe7ae7e82d426bf2326be0c99a74
font_01_sfnt_off0000f474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF474 10368 bytes
SHA-256: 8433ceb6d28e299c641fb746b221a5de1c59d724043cfeff64bfe4081b15798c

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