Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca1f198d46ffe83…

MALICIOUS

PDF

74.1 KB Created: 2021-03-14 13:59:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d40224cbd726c84b344b3fbf5188d7cb SHA-1: 057e79c78be098efe5f0ba66e8fab03fb753babc SHA-256: cca1f198d46ffe834034b11d9a5a5a238651110cbffae5e16f07cb90adeccebe
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of a large number of external links, many pointing to disposable hosting, suggests a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://maypoin.ru/strik?utm_term=dbt+skills+group+houston PDF link annotation
    • https://cdn.sqhk.co/libudezetuv/geiiUja/gangadhara_sastry_bhagavad_gita_telugu.pdfIn PDF document text
    • https://dopakuxapat.weebly.com/uploads/1/3/4/8/134895633/a5dea6b.pdfIn PDF document text
    • https://xuxoxipabixu.weebly.com/uploads/1/3/4/5/134588436/nironarotenimisixog.pdfIn PDF document text
    • https://poxawakepuk.weebly.com/uploads/1/3/1/6/131606289/xunuf_zivapedug.pdfIn PDF document text
    • https://vowebaxuzifov.weebly.com/uploads/1/3/0/7/130738870/6132867.pdfIn PDF document text
    • https://cdn.sqhk.co/nakijalufiw/i8jrBss/wwe_thunderdome_cost_to_build.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6558ac43-984d-4e3a-97a1-dec8860611ed.filesusr.com/ugd/c73740_2dd9a8e562cf4da48f4bd404ef04c869.pdf?index=trueIn PDF document text
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_9853c8c0e5c848f1ad6745b60316d118.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8499a2c-dec2-4532-afcc-78444c38b385/mibakexoxa.pdfIn PDF document text
    • https://3cde87c3-25ab-478b-b58d-ba072f1c7540.filesusr.com/ugd/255d97_b29fa01350c24b63ae34094f79adc0f2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nijudow/58583041809.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5446fb7-ef25-4f82-9ce6-bfae13dc0e33/dell_t3500_specs_price_in_pakistan.pdfIn PDF document text
    • https://9d3edb37-11ce-4d87-b861-4f8d850d55a0.filesusr.com/ugd/0d2aa0_84b8f071c9534bf5be066d241a0fa630.pdf?index=trueIn PDF document text
    • https://ecbea88f-e321-487e-b3ee-b24acecca261.filesusr.com/ugd/738632_f503606993314717afc180ee8195c1ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tugumeb/block_specific_websites_chrome_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9592857d-46d7-4b35-9106-08a8a9392273/90900896145.pdfIn PDF document text
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_66f3de6e8b064af09625d012d55beca7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c311a6-f47b-4bbf-8749-e1f222dcc08c/how_to_stack_a_kenmore_front_load_washer_and_dryer.pdfIn PDF document text
    • https://25f35837-e8ad-4357-b490-8f69bec4165a.filesusr.com/ugd/96c61c_5f0a7e4d032c425fa37f175bcaf3498c.pdf?index=trueIn 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_off0000e1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E0 5076 bytes
SHA-256: 628fb6956ad7c9584f085d10e583849255849098c0baefb10c83bf627a482db6
font_01_sfnt_off0000f323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF323 11356 bytes
SHA-256: f9ebab4eb37a40adf55e7b3f67e56bbaca824efeae1ed191501ad21952253f9f