Malicious PDF — malware analysis report

Static analysis result for SHA-256 709eae27b2cf7c14…

MALICIOUS

PDF

45.5 KB Created: 2020-11-05 13:49:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 7a7e7dd8a63fd442373a3b8e6bfd4e09 SHA-1: 9692f04d633fd84ac4862c0a4ad25b4529754ec0 SHA-256: 709eae27b2cf7c142a6328ab29c208e54a7764045ddbc872ccb7ccbc5c60c4b4
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://gettraff.ru/strik?keyword=minecraft+apk+full+game+free In PDF document text
    • https://nosekuge.weebly.com/uploads/1/3/2/7/132740467/xoditegalop.pdfIn PDF document text
    • https://nutarubanamu.weebly.com/uploads/1/3/4/5/134528768/tidav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446497/normal_5fa254653978c.pdfIn PDF document text
    • https://midepixa.weebly.com/uploads/1/3/4/6/134622545/2781199.pdfIn PDF document text
    • https://tejebufu.weebly.com/uploads/1/3/4/3/134353082/bd0dea8285da461.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f8966ae38349.pdfIn PDF document text
    • https://zigegawemofeza.weebly.com/uploads/1/3/1/4/131406932/jovukikunilenesorami.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465704/normal_5fa2bd08b8a72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5f8a21a0ec290.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/ab28f4ab-cee2-40f5-a825-50deb7c38c30/19801731416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02504e8f-525b-4a58-9461-8f67e9812116/stephanie_hayden_ford_nude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f85e3ae-cc10-4a4c-814b-36eb72681e72/58214117393.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/10th_new_syllabus_english_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bfd4eeb-9fd2-49c4-908c-308cb776a1cf/tumugogijamezenopugivowa.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/65676191638.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6341 5224 bytes
SHA-256: d7ca9da769117b53b874aa346f7341d270ff8deaf9dd6eb44ebf80c2fefcaa81
font_01_sfnt_off00007500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7500 6316 bytes
SHA-256: f76896f7d096f9b935e259409c34b741b77af16ba9ae7447370f0337b4f6703f
font_02_sfnt_off000085b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B7 10440 bytes
SHA-256: 0409b4537f84ff37bc1f7966c37ff04751c901dfa348394b7259cdd60ee5fab8

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