Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f420c62c6bdaf1…

MALICIOUS

PDF

48.0 KB Created: 2020-09-10 09:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 929268c426c7d61406f9786673430c92 SHA-1: 31895602f63efe199914378c9774fe38fcae2daa SHA-256: b1f420c62c6bdaf10258fe607731dd759491da8185ea915e5bbd2f0994250916
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://ttraff.me/pify?keyword=the+crucible+act+1+doodle+notes+answers In PDF document text
    • http://files.adriancoxart.com/uploads/1/3/0/9/130969735/7298105.pdfIn PDF document text
    • http://mutozopiw.danawensley.com/uploads/1/3/1/6/131606457/6834412.pdfIn PDF document text
    • http://files.spiritcreekfarm.com/uploads/1/3/1/3/131384436/9062587.pdfIn PDF document text
    • http://talejina.fiddleonthefarm.com/uploads/1/3/1/4/131452821/rikagufeb.pdfIn PDF document text
    • http://files.abbycampbellonline.com/uploads/1/3/1/3/131384281/damazunel_jibemefidex.pdfIn 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://cdn.shopify.com/s/files/1/0428/4894/4295/files/vixol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1699/3440/files/pogojuzipuruvilulero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7146/2814/files/banana_fish_op_full.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b48b60_1fd138da2c7343db9002797da03911ca.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/be5703_85c5555468d541b9a0db202c055fb3ba.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/286fb8_2af947572c214419a53e7f68b505d4df.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cc03df_4226ed2837f24606bc399b5c550038d7.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E20 5140 bytes
SHA-256: c1795ba935bf1a230e4a1552b92b1387dd319cce25c6ec96dc7e0203dd43f2f6
font_01_sfnt_off00007f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9C 11032 bytes
SHA-256: f3eb3b73e9ed7ffff6a06bdba73ec6ab1a5a7025347a3aa2b39ea8f24b0aa635
font_02_sfnt_off0000a518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA518 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333