Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc60c93c458a5051…

MALICIOUS

PDF

38.2 KB Created: 2020-10-15 23:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e047f3c9cfc8ae9e4e78712cde210243 SHA-1: dda75f048023d116702c59dab4ecdc58bebac837 SHA-256: cc60c93c458a505131cd14511d7059fe0c27e8df55bf2e2db6dfa3864b200b93
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/123?keyword=comptia+a%252B+220-901+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f8766ce394ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369520/normal_5f8841f771b73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5f88a42471970.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f874d8d353cd.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/pasifoxixugererupew.pdfIn PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/d9ea2c3983406.pdfIn PDF document text
    • https://molisemopum.weebly.com/uploads/1/3/1/4/131437834/30ebb2a6a96.pdfIn PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/texumorenotowulew.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kinufijozulof.pdfIn PDF document text
    • https://site-1043925.mozfiles.com/files/1043925/417486940.pdfIn PDF document text
    • https://site-1040675.mozfiles.com/files/1040675/vefitewijixid.pdfIn PDF document text
    • https://site-1041388.mozfiles.com/files/1041388/67139663406.pdfIn PDF document text
    • https://site-1037279.mozfiles.com/files/1037279/10666224811.pdfIn PDF document text
    • https://site-1041489.mozfiles.com/files/1041489/45031655506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5f87a85cc352f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f8715ecedb10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0502/0830/files/nyc_doe_calendar_2016_17.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3182/5050/files/vutojefapediwebav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/college_of_dupage_library_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/9326/3004/files/vepozojobegifanifamofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a55de321-613c-44e5-ad94-9d0175b1d8cb/zinole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aedeeadd-a58f-42ba-b023-f53e301372e5/95224476673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b451a534-318b-486c-b2de-a19cf3b43000/50826853753.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56EB 5424 bytes
SHA-256: e6fc2d4029b80ec050ba83cb535cc2f6f31b1a59673d992bb857c18cf150da61
font_01_sfnt_off0000696a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x696A 9928 bytes
SHA-256: 7ef7fedb3f24671b589f5e6a531badbc57f0aead0d39996f4633b8682e842b4d

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