Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2223593f998f0d…

MALICIOUS

PDF

48.7 KB Created: 2020-10-27 04:20:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8c8fc330935902222e9f7a725f0df453 SHA-1: 2fd13272e8888f2d1ba00df6555528af2c24ab70 SHA-256: 7c2223593f998f0d4f6335940d7717acceb57a2a854cd68b907a1f79edf157aa
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'Clifford g5 car alarm manual'. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the primary attack vector appears to be directing the user to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/strik?keyword=clifford+g5+car+alarm+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393759/normal_5f95f2b8e8ebb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_5f8a8fa2a5865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377908/normal_5f96050560c45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f89d49e224b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391620/normal_5f905d54ad76e.pdfIn PDF document text
    • https://nugaginidej.weebly.com/uploads/1/3/4/4/134475369/5295844.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/tekisaju.pdfIn PDF document text
    • https://gudojovevisepu.weebly.com/uploads/1/3/4/3/134314990/b93bb798.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7628/1029/files/vpn_app_creator_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7686/8514/files/reassure_america_life_insurance_company_forms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5289/8739/files/bilonukuve.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/37556599992.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/iannotate_vs_expert_vs_goodreader.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/joxagofif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7391/2488/files/jeradumezumudedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3634/3972/files/8000846749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2358/6712/files/73385538675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71a7cd31-b187-4900-9788-0ceb0792fafd/45742977366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3114cc3-ad6b-4940-9264-130a3cbb0b29/92659101338.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_off00007247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7247 4996 bytes
SHA-256: 51de7033d8f92fc6db0562d057a80c26784e87c0dbc73809ffafb533e607f12b
font_01_sfnt_off00008322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8322 10768 bytes
SHA-256: 8b6f0df3b66e92970a8f7793a0c554e1a70cba4bf3eb7520ec892ffb17139335
font_02_sfnt_off0000a7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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