Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0394bcc86a3641…

MALICIOUS

PDF

48.6 KB Created: 2020-11-08 02:35:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cd1ea42fa2f0b24bd7e00fd25fd82847 SHA-1: d243dcfa25daaa8601027134c8e27b05d7785f09 SHA-256: 1d0394bcc86a3641cb503ab2a13f4bb8e2f136f7a5ec9697536135a977bdc4fd
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Steal Web Session Cookie T1059.007 JavaScript

The PDF document contains heuristics indicating it is a brand-impersonation credential phishing lure for Instagram, using an abused redirector to point to a malicious PDF. The document also contains a large number of external links, many of which are on disposable hosting, suggesting a link farm or SEO abuse tactic. The embedded URL 'https://traffine.ru/aws?keyword=feed+us+5+unblocked+hacked' and the redirector URL 'https://ratigejav.weebly.com/uploads/1/3/4/5/134576845/6c289.pdf' are identified as key indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • 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://ratigejav.weebly.com/uploads/1/3/4/5/134576845/6c289.pdf.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffine.ru/aws?keyword=feed+us+5+unblocked+hacked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379219/normal_5f93d5c5906d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_5f8f8a3a60de2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371514/normal_5fa6ec5bdf439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375509/normal_5f8b69a655132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383138/normal_5f955b60c8dfc.pdfIn PDF document text
    • https://ratigejav.weebly.com/uploads/1/3/4/5/134576845/6c289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f8a31c8d5bae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410703/normal_5f991ba0b0d24.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://devegukow.files.wordpress.com/2020/11/4236770437.pdfIn PDF document text
    • https://regafuxexa.files.wordpress.com/2020/11/nakebiguvikig.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/54346796884.pdfIn PDF document text
    • https://pukewakedal.files.wordpress.com/2020/11/zobozewurodebiw.pdfIn PDF document text
    • https://fevenakom.files.wordpress.com/2020/11/68805348961.pdfIn PDF document text
    • https://gefavene.files.wordpress.com/2020/11/soaps_and_detergents_project.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/duvumat.pdfIn PDF document text
    • https://jogamoje.files.wordpress.com/2020/11/el_almacen_de_las_palabras_terribles_libro_completo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D9 5212 bytes
SHA-256: 551229913fc35402e0cd309c072d5a2a09d4643401a3857424612a0f5a5599a1
font_01_sfnt_off00007b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B96 10756 bytes
SHA-256: 9e73fe0c71b8cf9b60692c1af1c3abcce030e4a93f0fad82839aeef3ca761695
font_02_sfnt_off0000a021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA021 16084 bytes
SHA-256: b4071eb911d8dc62449cbe34e7b91a69a4d2916191845e014595e4e5e6ec2879