Malicious PDF — malware analysis report

Static analysis result for SHA-256 898738e92c27bedc…

MALICIOUS

PDF

45.0 KB Created: 2020-10-03 00:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 4595423573dcb3b710313cccfe413c47 SHA-1: 66f4364c46334fc78e759ad79238bf8f7826c10d SHA-256: 898738e92c27bedc2d4323885b01aadc91899a98659a522d3c6a109b8e5de2c6
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://cctraff.ru/strik?keyword=skyrim+companion+mods In PDF document text
    • http://mozov.affordablestoragemidland.com/uploads/1/3/2/6/132683071/169030.pdfIn PDF document text
    • http://files.strongerfamilyconnections.com/uploads/1/3/0/9/130969206/bovutekuf.pdfIn PDF document text
    • http://neguwadul.mauiportugueseculturalclub.com/uploads/1/3/0/8/130874001/selurejud.pdfIn PDF document text
    • http://files.debbiecordeiro.com/uploads/1/3/1/4/131483153/e03a99.pdfIn PDF document text
    • http://dexevata.troutbum.ca/uploads/1/3/1/4/131482995/6feb2.pdfIn PDF document text
    • http://files.afdmanagementservices.com/uploads/1/3/0/9/130969204/9e199cade95.pdfIn PDF document text
    • http://files.axel-kuehn.com/uploads/1/3/1/4/131407197/xadexon-lowiki-vunege.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/1/0481/3884/6371/files/pefir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7568/1947/files/the_bainbridge_mass_spectrometer_shown.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6643/1909/files/bonsai_pot_minecraft.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0037/5707/files/taviwirikemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2345/6666/files/shaggy_mane_mushrooms_ontario.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_off0000660c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660C 5044 bytes
SHA-256: e00a496537d760044dcecf5f3d11007c46b037eb77ad80032a0ab67a3cb25014
font_01_sfnt_off00007702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7702 10044 bytes
SHA-256: fdaaa920fa117b093ec9947981e55dedd7dd70eaab1012ceacecb76c06903b8c
font_02_sfnt_off00009960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9960 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71