Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9a65f3258ee6498…

MALICIOUS

PDF

45.8 KB Created: 2020-10-26 13:54:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d2db63fa5f1ee1c420a5ac574adac9a3 SHA-1: 1e5028b9747670e1644b74d5d83c24e57ced37ae SHA-256: d9a65f3258ee6498f90c6525b6e3f8376e89d144906e931f7aa513cb6b9ee4c1
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the document links to known malicious redirector infrastructure. The document body contains a URL that appears to be part of a link farm designed to attract traffic, and the ML classifier strongly suggests maliciousness. No scripts were extracted from this sample.

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.
  • 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.
  • 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://ttraff.cc/123?keyword=best+free+physics+games+android In PDF document text
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/wanimu-wibomefusu.pdfIn PDF document text
    • https://ranemexamegen.weebly.com/uploads/1/3/4/4/134440137/2927538.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/ab3a255eda76954.pdfIn PDF document text
    • https://femomupine.weebly.com/uploads/1/3/4/4/134458898/kexuvol_zidured.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/de9931.pdfIn PDF document text
    • https://nozagovedenide.weebly.com/uploads/1/3/2/6/132682533/dumedebukepuju_verupexokameni_lerapakaditu_nofisor.pdfIn PDF document text
    • https://lidenezat.weebly.com/uploads/1/3/4/3/134382714/c5d3d7c2608.pdfIn PDF document text
    • https://nikoxutaju.weebly.com/uploads/1/3/1/3/131378952/zobizit-rezubova.pdfIn PDF document text
    • https://fijefozumomaba.weebly.com/uploads/1/3/4/4/134491855/2079766.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/pazifetanegapu/loguguvej.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/mendelian_genetics_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/9258551568.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/brochure_sample_design.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/ms_excel_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/nikujejamijitanavegesed.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/ligidokaboxipira.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/amplitude_modulation_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7590bf4d-ce9d-4ae4-a6ea-7938a26d60db/mekisarasedavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5487f6df-b760-4025-8a9f-402ea8f3c085/kanulidemuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c29dfa0-12c2-4477-85b1-1b7dfada738e/modernist_cuisine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9d2fee-95d5-46dc-b326-eb228eff1d78/pofolix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39eab08d-c00a-4f5f-b0df-91247717b32a/vebejukejaxun.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_off00007258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7258 5688 bytes
SHA-256: a7ad7ba3357b5cb3d39328cdec13278333eb378cb2eee7fb2963424c9b398151
font_01_sfnt_off0000859a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x859A 10448 bytes
SHA-256: 9baab3d78a9133927a9cc7ae035d5a5bc233f81e8665830c1004dd15cb06413d

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