Malicious PDF — malware analysis report

Static analysis result for SHA-256 052beee103b41d48…

MALICIOUS

PDF

47.9 KB Created: 2020-11-08 02:02:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 17081cc4de34fc87520672f5411db33f SHA-1: ccb3dd59875888f885c741d9497f2c1d2fc4cb22 SHA-256: 052beee103b41d48b58a925444e15110c9aaa6af06a40415d6a781622277ab40
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://traffset.ru/123?keyword=csulb+summer+2020+tuition PDF link annotation
    • https://pikiravu.weebly.com/uploads/1/3/4/3/134347639/gadowuzedizezaj.pdfIn PDF document text
    • https://rixilokif.weebly.com/uploads/1/3/4/1/134109141/4009496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_5f922d453d114.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405902/normal_5fa2003eaaaef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411491/normal_5f9a648ba4825.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f8d708898557.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/cytoplasmic_male_sterility_review.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/76550283240.pdfIn PDF document text
    • https://zenomanotape.files.wordpress.com/2020/11/mimesolupejijukerifu.pdfIn PDF document text
    • https://wiwumonolime.files.wordpress.com/2020/11/temel_elektronik_kitab.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/juvunikumon.pdfIn PDF document text
    • https://dedisix.files.wordpress.com/2020/11/tesla_model_s_75d_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/bpsc_ae_pre_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/86556188456.pdfIn PDF document text
    • https://jororox.files.wordpress.com/2020/11/rudevubudagubibaso.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/wixidarujida.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_off00007d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6C 4940 bytes
SHA-256: ab6202fca5e816195849a9efadf06f87c46d63e54a3fea295f21e214dc39c8bd
font_01_sfnt_off00008e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E1E 10804 bytes
SHA-256: 934823c670608cd68dc39092a7f36f4e233e1a464a808cb4e5b8b1490443e103