Malicious PDF — malware analysis report

Static analysis result for SHA-256 03453b521b7c435d…

MALICIOUS

PDF

40.3 KB Created: 2020-11-06 14:06:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 8db9185584b7f4f65486d20683112978 SHA-1: 4866306040117d204ea3aba68da03bf057cf02fa SHA-256: 03453b521b7c435d00bd22279ff44f7d94c7e5b350bc0b8df9c4b1368f9a14d7
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=jurassic+world+evolution+enclosure+size+guide PDF link annotation
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/9719974.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378381/normal_5f9325ed25a4e.pdfIn PDF document text
    • https://nujuwededewomoj.weebly.com/uploads/1/3/4/3/134305400/7939811.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/219903.pdfIn PDF document text
    • https://lewubudakaxawo.weebly.com/uploads/1/3/4/3/134342842/c13f1f9.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/xexiraxu_jazamotixova.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/lafaletalelugivefa.pdfIn PDF document text
    • https://suguvojonejufo.weebly.com/uploads/1/3/4/5/134585364/zileze-zuduzilifijora.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/pefepo.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/tenunud/kibejewiwifogewisigilo.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/how_many_servings_in_a_bottle_of_wine.pdfIn PDF document text
    • https://s3.amazonaws.com/naramuro/wowexoziwerufadene.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/registration_code_autodwg_to_dwg_converter_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/corflex_knee_brace_stabilizer.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/sunni_bahishti_zewar_in_urdu_free_download.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_off00005d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D99 5300 bytes
SHA-256: e15454e24fe278920f45f81f24b6f53599f1a7a6be17bb973fe1c46a81a63bc3
font_01_sfnt_off00006fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC4 10564 bytes
SHA-256: 88b29e2117b303c09bc509648ebe11bfccd3c4d999bc323643fb7e72f262271d