Malicious PDF — malware analysis report

Static analysis result for SHA-256 da303b297c04a02f…

MALICIOUS

PDF

85.6 KB Created: 2021-03-20 17:06:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e72721e8571248f52f70653666d7726d SHA-1: 1b38a55efbcfce699a0189b934af47e3fd319aad SHA-256: da303b297c04a02fdf454cd0a56e662b6dbf2b7afa54f9c64233a186c470a7f5
232 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution T1539 Steal or Forge Credentials

This PDF file is classified as malicious, containing links to known malicious redirector infrastructure and exhibiting characteristics of a phishing lure. The document presents a fake download button and an MFA prompt, suggesting an attempt to trick users into providing credentials or downloading a secondary payload. The presence of multiple embedded URLs and the ML classifier's high confidence score further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=sims+3+pets+crack+download+no+cd In PDF document text
    • https://cdn.sqhk.co/naketego/hdjfAge/95295326851.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/how_many_globally_have_died_from_covid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388614/normal_60094b0b8aa2c.pdfIn PDF document text
    • http://nebofimanigi.sportsontheweb.net/zuniw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393632/normal_5fe4592f72617.pdfIn PDF document text
    • https://cdn.sqhk.co/xekutenupi/qcKgjjc/21490546995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414868/normal_60419ff8f2553.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450514/normal_5fe3923376e42.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/how_much_does_a_native_american_get_paidymn9y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461249/normal_602300fab34ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455380/normal_5fdd5a00debd4.pdfIn PDF document text
    • http://rujewazaxijaza.sportsontheweb.net/moxetupug.pdfIn PDF document text
    • https://cdn.sqhk.co/xagegegozi/igsXijf/google_play_services_link.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386824/normal_601421ebc6c34.pdfIn PDF document text
    • http://smeh-mif.space/nozeropedevogethca16.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mulapoxe.onlinewebshop.net/91371733647.pdfIn PDF document text
    • http://virefixifefuke.epizy.com/mexigefadaxowa.pdfIn PDF document text
    • http://naxesabefadufu.atwebpages.com/how_to_win_take_5_ny.pdfIn PDF document text
    • http://fekobovovexi.epizy.com/sejemozalagega.pdfIn PDF document text
    • http://badugumafuzalij.rf.gd/23646079567.pdfIn PDF document text
    • http://gametusepezuka.rf.gd/5230097252.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EE 5640 bytes
SHA-256: 4ce99b1647f18c9bf26361dee4c2cf3a97326ae766c19435246a76846ca3a687
font_01_sfnt_off0001081b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081B 13156 bytes
SHA-256: 24faa29ad02735e09abaafb2fa70a7a44a6461e22ec0e88e18f728f0d370d1bf
font_02_sfnt_off00013339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13339 16260 bytes
SHA-256: 71a36317e09dd363515bb5293a4812a6db5bcb475518b4c115fb6266f6f9e567