Malicious PDF — malware analysis report

Static analysis result for SHA-256 3be3c4a171a356cf…

MALICIOUS

PDF

50.2 KB Created: 2020-11-05 06:09:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 31e5263d6597e2c0629f1aabca43570f SHA-1: dbfa2da2c52f2b8f08dc2f838fd0020324515814 SHA-256: 3be3c4a171a356cf7ff68dd22efa0bce9a28a23ef7cbc3ef758b3f699d5c399f
234 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and heuristics suggest a lure for MFA or credential harvesting, and the presence of numerous external links points to a link farm strategy. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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
  • 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://gettraff.ru/strik?keyword=sign+into+hotmail+email+account+with+name In PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/5683404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378390/normal_5f8abd8f2d7d4.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/mufukep/80092736755.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/means_absence_of_contractions_of_the_heart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2178/6031/files/funcion_del_plasma_sanguineo.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/autocad_2014_basic_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/our_federal_and_state_constitutions_answer_key_page_32.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunoje/how_to_schedule_a_meeting_in_outlook_with_microsoft_teams.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/literature_review_on_typhoid_fever.pdfIn PDF document text
    • https://s3.amazonaws.com/gonuxiwela/navy_uniform_instruction_watches.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/rufoxamisagikixakixel.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_off000086d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D7 5132 bytes
SHA-256: 3bfe05dd1a411c022f9c82116ae66d93f58369c37625e535dbed732872f37a3a
font_01_sfnt_off00009835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9835 10336 bytes
SHA-256: bb6a5a72fb495ad233a755af4b15b00404f4bc67a85e586bf88a39494cc1ff31

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