Malicious PDF — malware analysis report

Static analysis result for SHA-256 dadf9cfc7d9fcff0…

MALICIOUS

PDF

47.1 KB Created: 2020-10-27 11:45:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ba974319d7a912001c281d088433b383 SHA-1: 92db806744edb1307e47a5494a8e1039b4ad5c2e SHA-256: dadf9cfc7d9fcff08da2f2628a2ab259a70ac7e36aa1f883f977fa2e84e28a2f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, disguised as a game guide. The ML classifier strongly indicated maliciousness, and the PDF was identified as a link farm containing numerous external links, many pointing to S3 buckets. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to lead the user to a malicious site, likely for further exploitation or phishing.

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://cctraff.ru/strik?keyword=tos+mythic+tank+guide In PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/linurigaruxox.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/5f43dfd0.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/5200784.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lanubili/muletu.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/53360475512.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/dibels_oral_reading_fluency.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/ethernet_cable_color_coding_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/dumofajivekizonap.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/calendario_2020_para_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/complex_sentence_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/kapogusamikisuvup.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/dibujo_de_planos_arquitectonicos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5db12c2a-baae-47f7-83af-86c37e3b464e/91559000457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bd38a95-6562-41f7-b5e9-db3a8439d863/gelatin_and_glycerin.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/neurological_disorders_course_and_treatment.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/accounting_1_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/bekixafuma.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/22869803220.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/navy_aptitude_test_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/vesoworapagigo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6694/5447/files/89352535036.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9392/7081/files/serving_humanity_alice_bailey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1750/2361/files/hermle_clock_service_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABB 5224 bytes
SHA-256: 23d3dfc9b8afbc0f3f2876f6bed04eff152d2668b7fccc298447413e656bba8f
font_01_sfnt_off00007c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5C 10872 bytes
SHA-256: 86d13748734150324f5d1c794aa2f05e7eb40bf33485ab9265fea12e44638a2b
font_02_sfnt_off0000a12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA12E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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