Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a26f503e0eb043a…

MALICIOUS

PDF

38.9 KB Created: 2020-11-03 10:24:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c2bb09979e01e28b056e726d5d8c2745 SHA-1: c3152cd12a490bcd8863d75b7e83e796e83c2295 SHA-256: 8a26f503e0eb043abb0472eca084988141545b7fb9f8d01f7bb47f8549c3ba64
214 Risk Score

Malware Insights

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

The PDF contains a lure related to email encryption and embeds numerous links, including one to a known malicious redirector. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document may attempt to solicit sensitive information. The presence of embedded URLs and the redirector link suggest the primary goal is to redirect the user to a malicious site, likely for phishing or malware distribution.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.cc/123?keyword=is+google+email+encrypted In PDF document text
    • https://visajemilami.weebly.com/uploads/1/3/4/2/134265887/resopawaluf.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/1/0502/4874/5152/files/bobcat_grader_attachment_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a7f1d03-4b6b-494c-b9de-8b24a1427cb8/65114577533.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1789/1750/files/24863925036.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2951/8741/files/star_wars_heroes_rancor_raid_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9242/5886/files/31597790585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93805e18-8322-49ef-8ae4-70da73bc34c9/54980408835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1274/1529/files/xusewu.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/50210698266.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3120/7837/files/peetz_colorado_coop.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_off00005bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC4 5432 bytes
SHA-256: dac1dbd10ce823c253dab401c68731d8bd731bf7cfa31cd19e839546444ade0a
font_01_sfnt_off00006e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2A 9792 bytes
SHA-256: a7bf86eef1829439346378f02006c08f4ff322f1f54e89e5289058af2514094d

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