Malicious PDF — malware analysis report

Static analysis result for SHA-256 d51165f186e0da56…

MALICIOUS

PDF

66.3 KB Created: 2020-12-02 15:52:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0786b9622ab3b221618712322b4dbf73 SHA-1: 0d780512cbd0d1aaaf865e54d65b775cb3afd9ea SHA-256: d51165f186e0da561f228a4cf5fe2be1ca0ac2cb8f1f369cb3fd12854295c2e6
154 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded URL, https://cctraff.ru/123?utm_term=abbotts+creek+elementary+school+raleigh+nc, is likely part of a phishing campaign attempting to trick users into visiting a malicious site. The ML classifier also strongly indicated maliciousness.

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://cctraff.ru/123?utm_term=abbotts+creek+elementary+school+raleigh+nc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4484143/normal_5fb2abd08d25f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408996/normal_5fa2f8d4cd2c2.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/fajixe/online_games_no_fortnite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e5865b-9c25-4b6d-aa72-66be8084f512/34365386366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/040bab0b-2047-42ec-a38c-022b18c2d86b/cool_random_useless_facts.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/10986390127.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/fonukabexepizira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43bc609c-1416-4d3a-9096-3d93dad20fda/zubamejuzur.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/kejojadubonibegologoseseb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4897f20f-1b29-4b1e-868a-fcdb0f2d28f4/7179453886.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/rivoka.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/year_3_maths_problem_solving.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffea5239b0722912c2f3a/t/5fc158305147b14804659507/1606506544721/rta_tier_list_summoners_war_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8ca0d4b-9274-4be3-80ae-cda57384c151/10008982515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/425d97ce-74bb-4531-b902-9f1eeedd0bbc/mastering_physics_solutions_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5EB 5508 bytes
SHA-256: 318e0fe83168b04b5471136a3e50e28b894822b7b92396d30d57f5c877b19eab
font_01_sfnt_off0000d888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD888 10812 bytes
SHA-256: 28aa361a452308ebaa077f468bfea8de4b36de39e512a0db2ffd0f6fb1550099

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