Malicious PDF — malware analysis report

Static analysis result for SHA-256 3caddc5bf855112d…

MALICIOUS

PDF

75.7 KB Created: 2020-12-25 18:45:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b54f30933a5606e8d894efc91456d581 SHA-1: 13c8cd77ed68d0dc318c265ef12d6914fe7aff28 SHA-256: 3caddc5bf855112dc3ef5bdfe83513888c81661054aa04dd6c10b4380772f44c
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a malicious link disguised as a technical guide, aiming to trick users into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the presence of a malicious redirector URL is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://cctraff.ru/strik?utm_term=disable+bluetooth+terminal+mac In PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/icrhGhc/t_galleria_guam_jobs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447466/normal_5fd635c607b81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474220/normal_5fa5e09cd9e13.pdfIn PDF document text
    • https://cdn.sqhk.co/lixejudazeza/hhpgMgh/star_wars_space_battle_video_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451566/normal_5fb96dcca2eda.pdfIn PDF document text
    • https://cdn.sqhk.co/dowufagit/bhijfFR/einstein_s_riddle_logic_puzzles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500440/normal_5fc04e16c423e.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/Ijajgcy/tebilabepufadadipo.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
    • https://uploads.strikinglycdn.com/files/ce606267-f133-42fc-b4c2-201dbf20bc20/injustice_mobile_hacks_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4151891-8538-475e-ba38-8f7c8eb28b63/jivazutovobenoxakufudovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e43debc-b33d-471b-ab45-b533fd7d0119/40138929860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/495c9041-c8d5-4c3e-9513-dbdf2a399729/ncert_solutions_of_class_9th_science_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de52212d-caeb-4fb3-83e5-a618ba38b36d/tum_bin_hindi_movie_hd_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f58009a7-356b-42f8-98c8-85001733cedf/gukukamitorisibafuwato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1328d8c-b790-43b1-9706-ee224687ad8c/bobasinivovapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a4d713f-4825-4781-8161-0cee635d94f2/redmi_airdots_user_manual.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_off0000dd49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD49 5060 bytes
SHA-256: b9038f9e5e692d9d0d92d4b4d789c13bdf9891b88f49ff45afcbfa49a28a256e
font_01_sfnt_off0000ee47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE47 10820 bytes
SHA-256: 1db09b0dbcbde9058639cc67d96bd7e1c5be7e2b7776d1f90ba4341a9672ecd2
font_02_sfnt_off0001133b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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