Malicious PDF — malware analysis report

Static analysis result for SHA-256 80867332b055858b…

MALICIOUS

PDF

75.7 KB Created: 2021-03-27 10:57:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b11ab7b5936b963930478d9750de781d SHA-1: c072c2abff9a9c69ad0f860d54e81568bc8fa0ed SHA-256: 80867332b055858b04674b8df28aac3cf60a6c726ab32cfa61cf4f373b4db8cd
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or distributing further malware. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent. The presence of external URIs and link farm characteristics further supports a phishing or malicious redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/123?utm_term=forklift+license+questions+answers PDF link annotation
    • http://onkoprofi.ru/subject_and_predicate_fourth_grade_worksheets1a1m5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418178/normal_601e10aebe0f8.pdfIn PDF document text
    • https://cdn.sqhk.co/jadojibam/jaEWVnj/nugate.pdfIn PDF document text
    • http://lasns.fun/fulatukovamerefodelu4g80.pdfIn PDF document text
    • http://itgermany.net/binomial_theorem_pascals_triangle_calculatorllplk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426421/normal_60156b2b79dfb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501991/normal_5fc8ea911a00c.pdfIn PDF document text
    • https://cdn.sqhk.co/wexovezojab/giFWNbd/rezabuwevejud.pdfIn PDF document text
    • https://cdn.sqhk.co/vimitewimuwi/igjdgjE/orange_tree_inn_deland_florida.pdfIn PDF document text
    • http://legendnat.space/jadavetapapexigilorrzrzs.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://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_d1dfabee72a84f56965becaee77b52e3.pdf?index=trueIn PDF document text
    • https://1dfef493-bba3-4db0-89f7-7cef958ceea2.filesusr.com/ugd/3dbeb3_eb490e40ef2d410e952e360b4ffd9c3d.pdf?index=trueIn PDF document text
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_7f2ee704dc4b445fa8f5c45c93cfde38.pdf?index=trueIn PDF document text
    • https://6525eaf8-9a42-4119-9fb4-c3d475b3b78e.filesusr.com/ugd/80bfa9_c0a8400c5db34317b64dc5dc61f2cb77.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db17a551-2842-4954-a552-4c324aa15db0/kepapasux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9df1cb93-ef73-46b0-903a-069ee4b25b04/best_books_to_learn_acceptance_and_commitment_therapy.pdfIn PDF document text
    • https://deed868a-3c3f-4b0d-b3ae-f9ebe8a38c33.filesusr.com/ugd/95283b_185a118b30b046f2b1223e01c9c2a9b6.pdf?index=trueIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_a2224a068cd54a7b958c34548ba79cf9.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dde1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE1 4996 bytes
SHA-256: 1456ea757df1d372b6a6b770d6296c91211dd5f3fda631bd5e970276d4464f3d
font_01_sfnt_off0000eefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFD 10708 bytes
SHA-256: e8a4da0f60a47964e53d8578a6ae86c66e484e68528d7ec9e3cacba198735ce3
font_02_sfnt_off00011399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11399 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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