Malicious PDF — malware analysis report

Static analysis result for SHA-256 c030d5e07bc1d458…

MALICIOUS

PDF

57.9 KB Created: 2020-10-28 00:09:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a5c1cadc8466250464bbb361e5a98156 SHA-1: b6a2194e6249c2a55b8191867a4e5f3561ed48ac SHA-256: c030d5e07bc1d4589d982e3eff00a143644b3ccefccaa628c3a12d373e503e7e
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a link farm infrastructure designed to host numerous PDF files. One of the primary links redirects to a known malicious domain, suggesting an attempt to lead the user to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=mountains+in+asia+map In PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/689ca099.pdfIn PDF document text
    • https://xopigitit.weebly.com/uploads/1/3/4/3/134339451/deravokuribomesir.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/sijakezivexos-nafugeribeg.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/naputuzijutizelej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408197/normal_5f9816bb65f8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f9498b5dbc33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393779/normal_5f93b9045532a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • https://s3.amazonaws.com/fasanag/61162502025.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/rupabozo.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/kavekanejefemoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/advanced_language_practice_michael_vince.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/pesokajobabe.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/medicinal_chemistry_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/27868033678.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/pebuxikupipogafobiv.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/vamajokugupenad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eac15135-e950-4051-b43d-bb97a12b91f2/lobixegexovukikexevufok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5100cef5-9da1-45e9-a1cd-befc42d46133/naliwomixesexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7421/6625/files/greek_god_goddess_of_weather.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7456/5784/files/robekabele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1467/1514/files/3543318154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8521/2064/files/2324284316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4514/0118/files/little_red_cap_poem.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7108 6444 bytes
SHA-256: ad75a3fb8d1a324d763a8c82389a3e2a9dd8a8c9b196c984c145fe147615345f
font_01_sfnt_off000080fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80FA 4844 bytes
SHA-256: abc865e2f55b561943b0d559a550679154e239c9011a8415305b9c3775485f7b
font_02_sfnt_off00009171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9171 8928 bytes
SHA-256: c736e221d45555663cef87556d5245fe544d63d696dffa537971f9a41bece869
font_03_sfnt_off0000a31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA31F 11720 bytes
SHA-256: 18143ea28d94b1ea5f020657fac07aac9772e4007c7f93f4f7d57102ec51c59e
font_04_sfnt_off0000c9e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E9 6232 bytes
SHA-256: b5fb6e4a4c64b579550a2c5e040f7e08918f2099a1dab874cf70fecbedebec8f