Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1a42cafedf9c69…

MALICIOUS

PDF

35.1 KB Created: 2020-11-01 10:45:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 84c417d5917a54133e024ea25cec924d SHA-1: de6b6d35b0530f522d6c747dc31214ead82c9141 SHA-256: 9c1a42cafedf9c69d99bd9728ff2453ab1081e3ddf6e129dad26d980d99088f9
154 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

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 1.0000

Heuristics 4

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://ramowukegi.weebly.com/uploads/1/3/4/5/134508735/7661448.pdf.
  • 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=chevy+manual+holder In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383561/normal_5f9dc844d6977.pdfIn PDF document text
    • https://ramowukegi.weebly.com/uploads/1/3/4/5/134508735/7661448.pdfIn PDF document text
    • https://lajawenofuki.weebly.com/uploads/1/3/4/5/134501859/jawuzezidalox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383131/normal_5f8de4aec026a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405195/normal_5f91a5531f8f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373986/normal_5f8bffd8422cb.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/28965462-feef-4a63-9c7c-a67bc6e12a1e/69049989929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/012ee6df-d1cc-4199-81a3-ba8147900dea/esther_reiki_alliance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13ab7386-5061-4d58-bfe0-51a8768b1e7a/81640822015.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/bixutun.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/75841618014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b93c92e3-5087-4729-9d32-a726b02d29e4/lords_supper_verses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/5667/3979/files/android_oyun_club_house_flipping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9157d6bd-394c-4c64-b98d-7bbb01ae8017/jotomiwajejofudejiku.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_off00004cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CD4 4952 bytes
SHA-256: 7e72e01c41d68396af4d00108c8b44997ec6a28e624a3190ff1b947cafc60293
font_01_sfnt_off00005d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7F 10048 bytes
SHA-256: f710a87152661e2f87253f2e838249319c0743472ccb36a7dab43436d4ffd74e

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