Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c5494e918eed41…

MALICIOUS

PDF

64.5 KB Created: 2020-10-29 04:59:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b8e9fd35f4420396348c219b33378916 SHA-1: 8b0ee65ce13fa7a4cf6ca03d1092bbd551fa18af SHA-256: 61c5494e918eed41864b2d95c3ab594364d4f84406fd1026914010fc9458d02b
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.link/123?keyword=new+testament+in+hebrew+language In PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/wakubaxux.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/dabebupupi.pdfIn PDF document text
    • https://mafogidafefuzu.weebly.com/uploads/1/3/4/3/134334422/a3044f6e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off0000bcb1.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off0000bcb1.bin)
    • https://uploads.strikinglycdn.com/files/c6a10bd8-8306-4d6f-8035-98e88df48876/51606115935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fd3eb90-0f60-4131-9d83-d78496fa18fe/pwi_world_boss_locations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2661/9287/files/hot_wheels_slot_car_track_set_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b62fd7be-e743-4ebe-b7f4-6a836918b510/46998622948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3e46246-69c1-4807-8139-8abf59623e65/4590961877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/875b6f51-e167-4b25-9e20-6ece6b1712cc/siritelasujusu.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/capitalization_and_punctuation_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e274a569-0c7f-4c1f-9931-f4332f8bc8c8/49488830761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e9c3c0f-89bb-48d4-b77e-ae72969f0a30/kokib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9944/5664/files/dixorigexudinewiratofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd64cc6-11a9-4a8a-93db-e118607c64bd/73149673628.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/59412985928.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/apartment_lease_contract_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/70796021991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce15c2e-616f-4f1e-adf2-62798ee90416/86841443013.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/benami_property_transaction_act_1988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1880023e-09db-4192-a980-54c7889b4eb2/ribexaxumuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0118/3896/files/two_step_clustering.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9510004f-42bb-4279-9fcb-c013d48b6d3d/strategic_management_and_competitive_advantage_5th_edition_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f30a7b74-700f-4431-b3f1-3ca90b476eb5/buxoforisosupeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d13d89f-9819-46dc-bbfe-f4b2c96102c4/pukigowimivezovekutow.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 extracted file (font_01_sfnt_off0000bcb1.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB273 2880 bytes
SHA-256: aff11289bf87f92bc53c0e2abc335208e29b6db8a954e82fd0a5595ffa95d344
font_01_sfnt_off0000bcb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB1 5300 bytes
SHA-256: f86bbcd84f043b017bff00f14ee3c484d5354fc464b36acda7ac34cd85c84d5d
font_02_sfnt_off0000cea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA2 11020 bytes
SHA-256: fa66d6550564f2b4510a838e781fef7067beeab01480d04fa5331307c09ae182