Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b9537504d6103d1…

MALICIOUS

PDF

75.1 KB Created: 2021-04-28 12:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 687005e36457e1b1673220f0770ca696 SHA-1: 5289488fa3f7e8be02c2f9322269f3b352172558 SHA-256: 8b9537504d6103d1fee649e1c8e8a3c400c19da91c3e68aee9cc12662cf1f10b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/strik?utm_term=the+fall+of+five+book+review In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_603b88e856b8a.pdfIn PDF document text
    • https://cdn.sqhk.co/balaragu/ii8hbhb/ropek.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/LgUSKhc/warzone_zombies_quad.pdfIn PDF document text
    • http://kikutitovibuj.22web.org/73388180473.pdfIn PDF document text
    • https://cdn.sqhk.co/wosinuwukabu/jagchbG/90569242796.pdfIn PDF document text
    • https://cdn.sqhk.co/tidapavibu/Eighdji/diwosurofim.pdfIn PDF document text
    • https://cdn.sqhk.co/kesusevuzep/hejjchi/33673452686.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/cD7Mvjh/77311430635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416918/normal_6029abdec4c0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384325/normal_60432d7aa7fe0.pdfIn PDF document text
    • https://cdn.sqhk.co/parapirer/HjeggLz/polda_6_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/PicGXf6/aldi_take_and_bake_italian_bread.pdfIn PDF document text
    • https://cdn.sqhk.co/bibilofefi/ewtLEih/nhl_standings_hockey_reference.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/fghM1he/infinitive_spanish_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/j3SpOha/38346570018.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/bbe67006-1bf2-47ef-9bf5-552ca97cd9c3/how_to_program_a_xfinity_remote_to_a_panasonic_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65d5afb2-3048-405e-b7ec-de61b86cf821/vikej.pdfIn PDF document text
    • http://ninoxodibigadar.epizy.com/basapiwuwu.pdfIn PDF document text
    • http://mepenaxuwijun.rf.gd/30138162756.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_off0000e735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE735 4980 bytes
SHA-256: db6fadf7b6f2e12e2da1d7717b49553316418112381362da70e8851c4665a530
font_01_sfnt_off0000f83d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83D 11596 bytes
SHA-256: bcc187de8b814c4314642415bfae16be73e22a1dfa649f901a5fa41ccdef9759

Open this report in the interactive analyzer, or submit your own file for analysis.