Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f44933775df23b…

MALICIOUS

PDF

46.9 KB Created: 2020-10-21 22:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 76ab90ca12c0d730aaa9c665289532c4 SHA-1: 73ca258862538bfd90b81939815553cf5b252788 SHA-256: f2f44933775df23bd655776ef75354b61dc9955af424f8b6b697c8fba53f3411
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://ttraff.club/pify?keyword=watch+espn+free+apk In PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/0ddbadb15912fe4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/06bf3c76-7cad-429f-b60e-96afaf1becaf/forelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd0f2703-5cee-4886-baf3-e1e3112b2a53/suvepudodunoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaea28a2-5704-401f-b4cc-0ae2d99c5f54/71907967301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39d33c24-8d47-4cdc-8757-042edc5ace45/kijopepuzotazobebekife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d03da5ba-998a-49df-b198-92ff430fe6c0/6204449353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8256a239-3860-4e2b-b93f-0a2ab41d9d89/buzoraxigezozuradodeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f602034-69fc-44f1-b757-3febbe5360d5/62856701824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dd6afae-1f7c-4166-b4e3-1fcee2bec0fa/41452153965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a12569c-fea3-4237-8a17-956827efa6b2/jupiwefotajarigekarajefig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3826/8318/files/62465096784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8380/1779/files/elements_of_a_play_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8837/0582/files/pisezokemirefaganibopaja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3167/3024/files/56789355988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4365/9677/files/pathfinder_psionics_augmented.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/94444464424.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/bosque_tropical_caducifolio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95a33c2e-940a-4190-bb7f-9955498d45f9/zero_suit_samus_naked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0565406-07b9-4e45-9edd-9b1a31fe8b99/37481256794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcb6231e-fc53-4e44-a91f-f3eab72a4cb9/gadinawil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cb61685-6b16-44d9-adf8-d88856c7f4f6/vujowaliri.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FDC 5148 bytes
SHA-256: b9886ba61360493a2b3c595e199e03ad231f624b760a66dce2d6cd83c8d7fcf5
font_01_sfnt_off0000615d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615D 6640 bytes
SHA-256: c8cb303e765c67f43d6d34f29c1d02953890772ff7b697be779fb29335000f72
font_02_sfnt_off000072fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72FC 11540 bytes
SHA-256: 44277543b63f76bdde7c8b11fcc12b6bc0230aec5008c572440379b92d6aa4ff
font_03_sfnt_off000098d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98D4 16168 bytes
SHA-256: 0216150ac0e5ade23b072752459620ec704bdac01526bfbadd96d51f96873ef3