Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd5897212a647c8…

MALICIOUS

PDF

47.4 KB Created: 2020-11-08 07:04:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 603aa686e4a0e8468f47df5f0ab797db SHA-1: 68e7bdd7e7f7d76f9d06b04aec54d33a260f17e6 SHA-256: bbd5897212a647c8d291d7fc4774ec46198a9ff05707fa4fe85d3a60bc643334
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://trafftec.ru/aws?keyword=power+interest+chart PDF link annotation
    • https://gilasagajeradek.weebly.com/uploads/1/3/4/6/134632792/lerogefiguv_xomajudixuvu.pdfIn PDF document text
    • https://xepajozojiv.weebly.com/uploads/1/3/4/4/134476610/fedatakevotigaj_balinuzalupafi.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/jaxesabi/medieval_china_facts.pdfIn PDF document text
    • https://tafexoru.files.wordpress.com/2020/11/3294531957.pdfIn PDF document text
    • https://zesosuro568656899.files.wordpress.com/2020/11/97033578694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b0eb43a-c48d-4963-97a1-4345d0dae5c9/xomor.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/smart_balance_wheel_manual_em_portugues.pdfIn PDF document text
    • https://nigiluzuto.files.wordpress.com/2020/11/75194047024.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/93992045312.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/merip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dacc4eb-4af9-4327-8104-c25d3743f798/vojib.pdfIn PDF document text
    • https://bubakujane.files.wordpress.com/2020/11/dugajowu.pdfIn PDF document text
    • https://bijusonif.files.wordpress.com/2020/11/kiguke.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/dobepozijur.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6515 4948 bytes
SHA-256: ff55962322f97e132fce78ed7e40679367875170f5d93d3a3cb7e3f974393f51
font_01_sfnt_off000075fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75FA 10980 bytes
SHA-256: bff4f2785d31123e6747ae67a6caa0975c551d41af80482ff9b7bb5e66127e27
font_02_sfnt_off00009b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B62 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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