Malicious PDF — malware analysis report

Static analysis result for SHA-256 178ff70cae864a17…

MALICIOUS

PDF

61.2 KB Created: 2020-10-16 04:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bc9c13515b0e5efee3659b38b01c1c6d SHA-1: fad55f4ad3fa806fb6bda23cd30a007915bd1944 SHA-256: 178ff70cae864a1755cd6a0e8eeb2e9b85352dbd79ed8fe8abfe8a6309a8d155
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://gettraff.ru/123?keyword=board+works+gcse+biology+homeostasis+worksheet+answers In PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/7373486.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/roriturosiw.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/fubisi.pdfIn PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/3cc39988c8b.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/d8e19292431f.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/bb2b6a49-baa3-4344-a309-d2655accb990/pubepivokow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/040215d4-534d-4b5d-82b7-ceedc77b1ff0/vusisoguko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05c3d357-6e10-400a-aa7d-d3a85c30bf9b/gumafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab7feeaa-7d99-4258-8dc4-4403614fecec/wawevuninafifov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c11b9cd-b4f6-4fe0-b8cc-a3a6f4a04c7f/57411456335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5080/2595/files/greenworks_pressure_washer_hose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6358/8502/files/detozivogitudorerudezur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1537/2953/files/dragon_ball_z_broly__the_legendary_super_saiyan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3059/9064/files/folizapebukikotaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8201/5129/files/cool_minecraft_castles_easy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8411/1267/files/71274174414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6326/9789/files/zirconia_crown_in_pediatric_dentistry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8648/8767/files/latigidunavokexipimesujap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34c2faae-cc1f-4166-90a4-44060179cf1e/piwitogupofelegidobivenal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd401a3e-3a19-4696-a48d-20633063d56e/jijizutuzituxuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f0b9508-5f49-4ca7-8650-e8f0324c01ae/vutuwaxabur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f361487a-d268-4b67-a9a4-2f9b7dfb614e/devupexiguxexunobudoxiza.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_off0000a3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3E6 2828 bytes
SHA-256: b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a
font_01_sfnt_off0000ade1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADE1 5800 bytes
SHA-256: 43ae60d7901d2705d97f26d771c11c6fa95cdd3a9eca575c9d8004750b0caf61
font_02_sfnt_off0000c18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC18F 10776 bytes
SHA-256: 1e0aa485db76ce285d888efb2d82bc5243c184a8081b9a515cdd82281841c5d4