Malicious PDF — malware analysis report

Static analysis result for SHA-256 a44b6c125ee52871…

MALICIOUS

PDF

48.2 KB Created: 2020-11-05 09:15:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 06f6d7f184b37d140bb5b7c91b84a8a3 SHA-1: bd18659a55f8db2d225d21e3d60267114564b4b1 SHA-256: a44b6c125ee52871c9bb539854d67b8583ecca72e3b1f034a6917c0b5137403f
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains a lure related to invoices and payments, combined with a critical heuristic indicating it links to known malicious redirector infrastructure and impersonates Facebook for credential phishing. The document body, though heavily obfuscated, contains a URL that aligns with the phishing lure. The presence of numerous external PDF links suggests a link farm used to distribute the malicious content.

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.
  • 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://moguvikob.weebly.com/uploads/1/3/0/8/130874292/59d560bde16df8.pdf.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://ggtraff.ru/aws?keyword=easy+retired+millionaire+scam In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420239/normal_5f9eaeb97ee61.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/59d560bde16df8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392869/normal_5f9cfb44d5039.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/beparinunij.pdfIn PDF document text
    • https://doriruvoni.weebly.com/uploads/1/3/4/5/134585963/e9bd0a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5f9381d76fe5e.pdfIn PDF document text
    • https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/1187554.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f91521991932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5f8d750bdef03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374851/normal_5f891aa476529.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/mibiwivanetuj/plus_one_botany_chapter_wise_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/rezufofatobogelalavin.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/nezolumipigebetebo.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/public_policy_making_process_in_the_philippines.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_off00007b64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B64 5144 bytes
SHA-256: 45340ddecf57da36a067d6f72e633483c6cf2da78e2ef8af91d450f6aaff4460
font_01_sfnt_off00008cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDA 11304 bytes
SHA-256: f66af582b8d2d2ecea4dd672e1ba4250c6208d61a22377d86dad868fbc317c00

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