Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba8c85b2668fd29…

MALICIOUS

PDF

51.8 KB Created: 2020-11-06 21:19:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: e2d2b3c6613738d113e8c461c3b15703 SHA-1: 205b0900a8af0bd56daa98586bfbe9f7b3bc9afa SHA-256: 1ba8c85b2668fd29ff47ba86ff677e646dd4f01d12b847d73402f841378276c8
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://trafffi.ru/aws?keyword=dell+s2409w+monitor+manual PDF link annotation
    • https://nimewoguvinu.weebly.com/uploads/1/3/4/4/134433183/bd8375d34c.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/buredivularab_dafawoladufamef_numavekajoxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375087/normal_5fa229ec65c66.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/tulosa/rabawigenupunoximebozo.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/ba_bed_syllabus_2019_in_hindi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/swedish_language_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/68665439458.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/procesos_de_degradacion_del_suelo.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/themes_in_chapter_24_of_to_kill_a_mockingbird.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/runuvifavunafira.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/trombone_slide_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/auto-loading_holster_destiny_2.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/branches_of_life_science_with_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/fomawipafuz/mesulavobegab.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/68645207211.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_off00007d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2F 5440 bytes
SHA-256: d10294fb435d0d2ce5a32c8f476454f13f15b81d582d2c46ae5608949a5f51f6
font_01_sfnt_off00008faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAA 2048 bytes
SHA-256: dd69bf95758cf82fd4c4b1b39bd9773942746eca5ff49c782f12987e24aa629c
font_02_sfnt_off0000988f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x988F 11928 bytes
SHA-256: 595114f365afc18d5401418d19573eeec0e29c14341627c42f0342d10401948e