Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa697ab28d327b9d…

MALICIOUS

PDF

65.8 KB Created: 2021-02-14 23:54:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b2de029f192dd50a90c78a011b1c6d7d SHA-1: e4429173aebc1ea6dffb4d638a499a257e6fd97e SHA-256: fa697ab28d327b9d1a689fabf5eb31d99851e9711321f956e4cc2a835595957a
66 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to disposable domains and are likely intended to redirect users to malicious content. The ML classifier strongly indicates maliciousness, and the presence of multiple links on disposable hosting suggests a link farm or redirection scheme. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jacksth.ru/aws?utm_term=b+v+raman+books PDF link annotation
    • http://axecheat5.xyz/nerafupewebakqc50n.pdfIn PDF document text
    • http://gutprod.xyz/62638379100kwnfs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484126/normal_600dc4ec35ec6.pdfIn PDF document text
    • http://healthyforczechrepublic.site/arya_nuvvunte_song_ringtonebb5s3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491705/normal_5fef68da6fddc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372972/normal_601765a04ebdf.pdfIn PDF document text
    • http://paradusafe.iblogger.org/free_resignation_letter_template_microsoft_word.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/functional_training_handbook_dowxtw2n.pdfIn PDF document text
    • http://fokikizuxijem.iblogger.org/wizotinamovalawusifit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417523/normal_600373bddf07e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503692/normal_5fe6513b6ccb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_6028620f498e9.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/jepinebawo/43237019484.pdfIn PDF document text
    • http://tapewiwesumufug.epizy.com/discovering_tut_summary_and_question_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/62920605125.pdfIn PDF document text
    • http://kegipufi.rf.gd/digital_electronics_basic_interview_questions_and_answers.pdfIn PDF document text
    • http://xavemiwikujuxuk.rf.gd/25218481685.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_off0000c2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C9 5112 bytes
SHA-256: 8daff7031abef75cb2150dddc99b5b4c3b8432ff6b2a204cd186c612b103ea18
font_01_sfnt_off0000d41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41E 10908 bytes
SHA-256: 3d91db3935e636a544caf3878e38948b79e4f0aef183b64778c346decaa5aaa6

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