Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f14c138b444850…

MALICIOUS

PDF

66.0 KB Created: 2020-11-06 04:02:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 78ad59e6fe72b9039a9265f2c5f674b9 SHA-1: ce4ad873def944621bf07f37649b04e0377c8806 SHA-256: a0f14c138b444850cbcc3cf1efd103b5356989e6a74a58a032d46db38e5833c6
176 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/123?keyword=dos+commands+list+drives PDF link annotation
    • https://xasugalepo.weebly.com/uploads/1/3/4/3/134311154/wukavo_wupaz_sonal_fowamilij.pdfIn PDF document text
    • https://rizenorugeworo.weebly.com/uploads/1/3/4/3/134379336/8827276.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/5533995.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/1/0433/6041/9989/files/zumosavesupigo.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/91510861178.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/ravasizun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5749/4188/files/laxoworeraz.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/maharashtra_audyogik_vikas_mahamandal_recruitment_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/genulafi.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/pelokamixipigi.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/definition_of_data_processing.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/25762435354.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/13623059789.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/55643875896.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_off0000c19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC19B 5144 bytes
SHA-256: bdcb8878407882d9c6b1686ee4222bee0826dc25853f1ee582429517b081509e
font_01_sfnt_off0000d30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30A 11808 bytes
SHA-256: 895e1c01653028e639ba53d214d5a1405e7df48e53a194137346e7344f72ab32