Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2b30421754067d…

MALICIOUS

PDF

49.8 KB Created: 2020-10-27 22:09:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 60b3225faade78200c2e842fd9821ee9 SHA-1: df9a0acc956b4f58c9d475b217f2ab080f4d88c8 SHA-256: 2e2b30421754067d4b4dde05d53c3b95de82d435a7ee3cda65d5054da9b76615
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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=series+convergence+tests In PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/8530d8c7e206.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/d1f926f60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f89c03660ec3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419002/normal_5f96344661dca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369525/normal_5f8e1b58a4b0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374359/normal_5f8f46e2376cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c77db1e5-ecca-474b-a386-85e1dc23df9a/busula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b3a761-6379-49ca-9a1d-0fbcab9ff393/6673728044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/934b0774-089f-49d5-81d2-4e80a53b1829/jojimozaririn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2153/1293/files/faguzitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4711/6191/files/tesug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/2214/7494/files/bike_basket_for_dog_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8737/3499/files/95351839016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2609/8594/files/56985513988.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/arabic_dictionary_hans_wehr.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/quality_assurance_pharma_interview_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/causes_and_effects_of_acid_rain.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_off00006ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA8 4888 bytes
SHA-256: 637c7490d536525780fadfb45b965cbd6728ffce3bc6a831b027dd0e656db8d2
font_01_sfnt_off00007c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5E 11968 bytes
SHA-256: afe4988b8cb56a4c3c05313f0d2da152d692ceeea8f00d646149a4497b9b5b5a
font_02_sfnt_off0000a4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4EB 16116 bytes
SHA-256: e15b17d067faee8d9d79ab7b11bdf812c29390801b8b072a333d2418826f0db9

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