Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa1e438779f8770…

MALICIOUS

PDF

73.4 KB Created: 2021-03-01 21:49:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9d684a91c25e54bc0e2eb9e6792ee1cd SHA-1: ee759291afb7ea7c9625cd385300813c0347a6bc SHA-256: daa1e438779f8770ba1524ab6c5380257f979f478d97dd02be0902056c7ec025
154 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic and ClamAV detection. The embedded URL is designed to trick the user into downloading potentially harmful content by promising a free tutorial. No scripts were extracted from this sample, but the presence of a malicious redirector is a strong indicator of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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://crophysi.ru/strik?utm_term=ansys+workbench+video+tutorial+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4497356/normal_600a04df73377.pdfIn PDF document text
    • https://cdn.sqhk.co/lazogapuvo/jIEjegj/hidden_object_games_online_for_free_no_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/fjiEQwS/the_world_of_magic_mage_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390330/normal_6015d3051d7fd.pdfIn PDF document text
    • http://xonitaj.mywebcommunity.org/48302709984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373264/normal_6027f687435b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485318/normal_5fe3735bcf248.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367302/normal_5fc94b8f3de5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390329/normal_5fc98c5fcbdbf.pdfIn PDF document text
    • https://cdn.sqhk.co/fekesolip/gjqgjTN/zawabonanaxawadirasupov.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/jidcjeS/nba_2k20_release_date_nz.pdfIn PDF document text
    • https://cdn.sqhk.co/tolononof/4FHHqhd/money_maker_strain_flowering_time.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/bupigow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jotizifime/2547959922.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/ittimani_box_office_collection_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/53496218848.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/football_manager_classic_15_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/tusarulebek.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/bid_wars_mod_apk_2._10._1.pdfIn PDF document text
    • http://tofujuwo.onlinewebshop.net/xevubukawifomazulotuwif.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/badminton_court_diagram.pdfIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/japavuwanamoto.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_off0000e1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AC 5556 bytes
SHA-256: c1027403dab5fd7765712722148fe2811db164b4a81761ae8891e7d77aedbb31
font_01_sfnt_off0000f4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AE 10416 bytes
SHA-256: d76cc125ff4e3092286aee973654791445f116b6f0a12caa04430a3e6945953a

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