Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2351153f5690b8…

MALICIOUS

PDF

41.7 KB Created: 2020-10-26 14:21:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 83271b61f18144a6e23613dab0fe3cab SHA-1: 7fa2191079104870dc52ea1953c38b2df0e26c29 SHA-256: 1c2351153f5690b8ac07a07cd1dadd01816848e379d03951a746e091597c8e46
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, disguised as an 'Evicore prior authorization form'. The heuristic firings indicate the PDF is designed as a link farm, likely to distribute malware or facilitate phishing. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly suggest a phishing or malware distribution attempt.

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://ttraff.club/123?keyword=evicore+prior+authorization+form+pdf In 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://uploads.strikinglycdn.com/files/16f96b50-cd8f-4c0c-a52a-5a51148e3e9a/forazelepagiritubevaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20a91f0b-91bf-4e83-ab30-d5c0f1166762/nosododigitafugitig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dca9b461-986d-4ce6-a26a-11f3d67397f0/mekokapixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d18f93a2-2aea-4bc5-b52b-75cd3d2fe00a/mlp_cutie_marks_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/wufebagi.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/ashrae_standard_90._1_si.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/java_apache_poi_docx_to.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/fusujofab.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/full_body_bodyweight_workout_program.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/54906025511.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/mekasujesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5134/3768/files/penabatomakopexorug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4530/6011/files/68387993604.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/mixinalovi.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/nowimisuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/advantages_of_reading_for_students.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0205/8678/files/forms_of_energy_crossword.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4839/4143/files/retrofit_android_post_request.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8391/5962/files/kufasigonalogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8205/5833/files/99882275584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9087/0423/files/fulton_science_academy_bell_schedule.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000566e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x566E 5132 bytes
SHA-256: 205a04a904a7998544f50f8ad678c262983e5a75850066aa976679823bcb6d80
font_01_sfnt_off000067bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67BD 11148 bytes
SHA-256: f7ed963399e9031b6da22b8f400e7fea01f2f178897d874c0f459101ddc2b318
font_02_sfnt_off00008b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B52 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.