Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbdc314446e178ce…

MALICIOUS

PDF

63.1 KB Created: 2020-10-30 19:44:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: aec5b934d107ec8024dd414966a6743f SHA-1: 73ee7d777ce54f3a2f5ee253a87c767e8b948f7f SHA-256: dbdc314446e178ce376a0d83e1acc7499f915ceec84b27d4aa375596f8f68003
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure to install a browser extension or update, a common social-engineering tactic. It also includes a link to a known malicious redirector, which is likely intended to deliver a second-stage payload. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=tanks+2+unblocked+games In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389821/normal_5f95df77e863a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419822/normal_5f9696f150e31.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/toguvaju/89909368754.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/accumulation_by_dispossession.pdfIn PDF document text
    • https://s3.amazonaws.com/mazugezijap/supukukofife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d18a0eaa-bd7e-4888-bc4c-ce44b594043c/cleaning_this_gun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce370188-f3f3-43cd-a3d1-4a129fb3da69/11562205149.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/abnormal_meaning_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/67256986226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75d86555-50ba-4fc7-b7d3-8bd77413020e/55502203823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01af8e2a-8c36-4fb0-9b35-c4341491ac7c/38894967699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8406/9526/files/20365738473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45a05cce-7bed-4e6a-9c69-159b9c89cba2/bidape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90104828-bc4a-430b-97aa-101f6362c43f/begisiwoxujopuboganagoxep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5104/1447/files/manguito_rotador_lesion.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F66 9212 bytes
SHA-256: 6319e8f6c151f00192dfaf38bdd9666b3195ae20c481902244e0816cd9c7e82a
font_01_sfnt_off00009dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC6 5448 bytes
SHA-256: b606466797606d6edc9698b764671199a961018ceb6a9d04266ee1c3229a80d4
font_02_sfnt_off0000b038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB038 5672 bytes
SHA-256: b8b9833d00acbbba4f10cb65ed9772d9689f64607bef7b6513fe64eef99df5eb
font_03_sfnt_off0000be40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE40 1688 bytes
SHA-256: 99bfee4757303f27d80f965204bd28520d1050411813ff1d804f26a4af20f1a6
font_04_sfnt_off0000c6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AF 12172 bytes
SHA-256: 40c30d16727c6d27dea55fa8c4c290749e52f041d0c112a8f9d4a7b09d12495f

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