Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a5c954cdd48aac…

MALICIOUS

PDF

40.9 KB Created: 2020-10-15 22:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c5328d8544d2b70ec02d0732579ab3fe SHA-1: bc63ef0c6bde03124fc6dfd8857735a9d48da1a6 SHA-256: 30a5c954cdd48aac8c5733c49489f91f7945523732e3a0e0a3f1ad4ba9d02c1e
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with the primary link redirecting to known malicious infrastructure. The document also impersonates a cloud service, a common lure for phishing or malware delivery. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or engage in SEO abuse.

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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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/pify?keyword=apple+ringtone+for+android+free+download In PDF document text
    • https://site-1042835.mozfiles.com/files/1042835/xonepamokavaxedosasijik.pdfIn PDF document text
    • https://site-1043353.mozfiles.com/files/1043353/86750945271.pdfIn PDF document text
    • https://site-1043530.mozfiles.com/files/1043530/rabarozef.pdfIn PDF document text
    • https://site-1041608.mozfiles.com/files/1041608/70352843943.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/xekena.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/labuj.pdfIn PDF document text
    • https://zapirawega.weebly.com/uploads/1/3/0/9/130969804/mivejuxida.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lukuxaluk.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/tidivobinimigip-banez-batipafon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5272/7972/files/42086136052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9112/4131/files/pasco_county_hurricane_shelters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3183/4009/files/gaps_diet_recipes_stage_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/turn_undead_5e_paladin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7555f1be-1230-403c-b0fa-58428359e6da/25405546572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b89b06-1d89-46fe-92d2-77093cb1a690/68273709105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3742/3776/files/since_we_met_nawlage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5248/4766/files/work_from_home_nurse_jobs_las_vegas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7638/6457/files/betozosetuvaligukukut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/bayou_breakdown_alto_sax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2409/5653/files/cpsm_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9027/2152/files/p938_recoil_spring_guide_rod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7928/1056/files/upright_citizens_brigade_comedy_improvisation_manual_ebook.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62ED 5112 bytes
SHA-256: 1937863bf1e1322b2c7095bee79858cb82a3bfa0f272cdcf577578f34e435963
font_01_sfnt_off00007471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7471 9840 bytes
SHA-256: febd149752708a5b72b6abaf07f433e79d2e46966799b19062550bef715c3c96

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