Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc15f8e6a523e71…

MALICIOUS

PDF

51.4 KB Created: 2020-10-27 14:45:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e1ff6184b093cbe69ab8cc6d60c0aea5 SHA-1: dbd9bad62b9d626a50b05e421aaf2a9f8d3c717b SHA-256: 7bc15f8e6a523e71d69ebc88dd46628fb9ba8553035f4b27173c8ce61b4b4683
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://gettraff.ru/strik?keyword=destiny+2+mars+data In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f86ff8302644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f8aabcc65f47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_5f96005938040.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f8e2210eef55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367640/normal_5f91ba06910e8.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/sinalimib_zumaxupiselu_buwusin.pdfIn PDF document text
    • https://bawuzuxagoju.weebly.com/uploads/1/3/4/3/134340420/xerosebaxex_zejose_vesenedixira.pdfIn PDF document text
    • https://bidutujube.weebly.com/uploads/1/3/4/4/134403342/8107095.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/tetofamuxulil/venazixowejumi.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/dukeweg.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/91924887463.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/18th_amendment_in_1973_constitution_of_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/administrative_science_quarterly_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/61162502025.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/leo_l._beranek_acoustics.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/states_of_matter_worksheet_grade_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8099/8298/files/wolf_ventilation_hood_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/9428428369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1399/6183/files/coffee_tea_or_me_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3210/7937/files/kuzipigaratuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9823/3760/files/candy_apple_band_dr_deb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3850be21-e090-47e8-8311-eda9dae649e4/21810419134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecaa140e-98fb-458b-bd47-040130df7cc3/47090471981.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_off00007fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD0 4852 bytes
SHA-256: 81051d7123752af06d85a85b07e30abe637ba87f12218c79b22ae98b454f70f0
font_01_sfnt_off00009026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9026 9932 bytes
SHA-256: 7960708c38c974be01105f87d206e9c12aa4dc32156accd62f43ecdcf54f34a6
font_02_sfnt_off0000b23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB23C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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