Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c1e8d5eb17122b…

MALICIOUS

PDF

37.5 KB Created: 2020-11-06 17:41:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: c5cf09df6124fa8796a99c6fd3f743e2 SHA-1: 449d134bc1724b3dd0e85cc1b046ad99c0203b92 SHA-256: 54c1e8d5eb17122b057122f6a699073904caf0378861dd291a0f0b96b4bd641f
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffking.ru/aws?keyword=mixed+aggregate+planning+strategy+excel In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369630/normal_5f89fb2437561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418192/normal_5fa18894534be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382194/normal_5f8f956051334.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/472464.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382413/normal_5f9540066815d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370068/normal_5fa201e1c4935.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dc6e66e-57de-4c3c-95c4-d69ab2bb5da4/barrons_sat_practice_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c2195c8-28c5-42ac-ac1c-65a030bbdc58/kuludomagex.pdfIn PDF document text
    • https://fategokixeju.files.wordpress.com/2020/11/jasajapabuzodevuboja.pdfIn PDF document text
    • https://rukawakoxofo.files.wordpress.com/2020/11/2020_nfl_season_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/90310546177.pdfIn PDF document text
    • https://jubiligaduj.files.wordpress.com/2020/11/33853379744.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_off0000518e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x518E 5416 bytes
SHA-256: 98e6fd1d86828388251fc1f4db76147e7fd900f3d33410883209a3182e5793ff
font_01_sfnt_off00006425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6425 10796 bytes
SHA-256: ddb9ca97f761c1f60742fb52b9044722c76bb2dd56c17f4d2a9bcb2d9460b3ec