Malicious PDF — malware analysis report

Static analysis result for SHA-256 283467fc59cd79ba…

MALICIOUS

PDF

49.6 KB Created: 2020-10-07 06:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: d1530aa82a53def378e06f470bbc96da SHA-1: 7e4470b1361e8b8ac5c1418cd98f0db0b7237026 SHA-256: 283467fc59cd79ba9dc9ed354ff1fb1b981f6a0e929cd632015d74bba42d2459
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=new+bengali+movie++480p In PDF document text
    • http://vemigov.malheurrappelcrew.com/uploads/1/3/0/8/130874422/sabomitasolatan.pdfIn PDF document text
    • http://feseje.sarahconnatser.com/uploads/1/3/1/0/131069839/sopezimexizitik.pdfIn PDF document text
    • http://tujifu.kalliopearts.com/uploads/1/3/0/8/130874498/9249450.pdfIn PDF document text
    • http://files.benjaminmcvey.com/uploads/1/3/1/8/131856234/madakivesivat_pusesebimomome_nevesiwebilasa_vazese.pdfIn PDF document text
    • https://site-1043765.mozfiles.com/files/1043765/73938400242.pdfIn PDF document text
    • https://site-1039308.mozfiles.com/files/1039308/gakapakimazediwidafetula.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/1/0437/0304/2216/files/wish_free_shipping_existing_customers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1766/9278/files/fibuwefezonewolutoxijores.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/1211/2803/files/wii_u_lens_cleaning_kit_amazon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1675/7663/files/bugs_bunny_costume_space_jam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0659/3696/files/chihuahua_mix_puppies_for_sale_in_ohio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0737/7047/files/darkseid_vs_superman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8797/7366/files/reglamento_de_construccion_del_df_2017.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_off00007613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7613 5260 bytes
SHA-256: f568d896bbbdabaf10f52c6081aa8faeaf0a87efad85f71afdda2f961d5dbc59
font_01_sfnt_off000087f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F3 10352 bytes
SHA-256: a3f3a326c6cfd8cde2c109b8395d7816edee16ce30555a0d2fcb70a12fe1edec
font_02_sfnt_off0000ab50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB50 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34