Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3f0944573c0592a…

MALICIOUS

PDF

60.2 KB Created: 2020-10-29 12:47:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 76ea6f47710847c904d0af151849d155 SHA-1: 401fefad7f245c49eb6e2c358ca22b18b5dcf87d SHA-256: b3f0944573c0592ae992d150ba36052b33e4e1a0d133fe6298aa2464efd401b7
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.me/pify?keyword=ingroup+and+outgroup+theory In PDF document text
    • https://guxesawaxogego.weebly.com/uploads/1/3/4/3/134314991/natazonigiki.pdfIn PDF document text
    • https://fimosezit.weebly.com/uploads/1/3/0/7/130775491/6388901.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/27ea7b6f6e4b8.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/linabu.pdfIn PDF document text
    • https://relogeseji.weebly.com/uploads/1/3/0/7/130739887/40f4dfc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f8f28bb-d156-4759-827b-3fda797250b3/mefamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/5732/9350/files/jarogepigo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0499/3951/files/42875637616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/3258/4607/files/37994867791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53821c91-18de-4d6e-8b58-3059549b39f0/mobonefive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ade934-4c6e-4e18-b581-fd9798c7df4b/kuzudemifejirojob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80aee8c5-cbf3-4adc-801e-0d0084b7cc72/porikulagaditu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3022a4b7-ae64-418f-866a-87de54a0605f/36391569641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4853/1635/files/fafawuremunezixawolom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8528c8c1-147b-4d69-8ad6-a299e0f6cc2a/a_pocket_guide_to_college_success_2nd_edition_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8810/1030/files/senabinado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3648/9893/files/distinguishing_fact_from_opinion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4119/3127/files/print_sewing_patterns_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2263/1067/files/jenilif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3070/7865/files/finding_fractions_of_amounts_year_3_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee2c4947-4f60-49b4-9830-4270c0407773/stellaris_baldarak_revolutionary_fro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9209/2085/files/dewubanofijixaj.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000b742.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB742 24764 bytes
SHA-256: 9646f39f2781c68973d0e55dacb54cd895b8881abaa269919ea3f9fef56a5523
font_00_sfnt_off00008070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8070 5048 bytes
SHA-256: 9cb6b8bf18b9ff3e5f008e3945af48c1bd5fa5dbf72eecf0497c72032d1ef845
font_01_sfnt_off000091a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A1 10984 bytes
SHA-256: 8be2afab7aa1edd0339b67984e0ab287c7dc2d5094c4e9f7af36101bd8d86bf7