Malicious PDF — malware analysis report

Static analysis result for SHA-256 161130ae04a9cbcd…

MALICIOUS

PDF

37.0 KB Created: 2020-10-29 16:45:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: edffed06941eee9fd23a21bb4d6bbe99 SHA-1: faf3bdc086f8734032fe107c6e21c2bebce1428b SHA-256: 161130ae04a9cbcdd21b25319157f28c899dfde1dc8c0264093e3b6050f07aa9
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?keyword=zones+of+regulation+thermometer+pdf In PDF document text
    • https://fukobararusi.weebly.com/uploads/1/3/4/4/134404541/dekuda-tulofal-vifupigejogiruk.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/84c9c35d0eda836.pdfIn PDF document text
    • https://fusesekomufe.weebly.com/uploads/1/3/1/6/131606177/ganejezakixetix_vepus.pdfIn PDF document text
    • https://deledixedebudon.weebly.com/uploads/1/3/4/4/134499708/dorudukudimibiwe.pdfIn PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/limadizade.pdfIn PDF document text
    • https://zelidewa.weebly.com/uploads/1/3/4/3/134371532/bodenegorimeke_dadex_bakimok_zomumirid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f8875a63f84c.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000521e.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000521e.bin)
    • https://s3.amazonaws.com/podawakumepewez/tirokodigimogexigelakomad.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/10237626038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46a1e7e6-8fca-4a3c-b79f-c9ec1d4ecba7/60614894699.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 extracted file (font_00_sfnt_off0000521e.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000521e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x521E 5412 bytes
SHA-256: 1b86bf19210be870af0276de81abeeba9ea186b4b9f0beb88dba244e512ebb2f
font_01_sfnt_off0000645d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645D 10376 bytes
SHA-256: cc682a472741ad38d3da97e85723592f89ccfeafd47f382ef99ec98d8242ffb7