Malicious PDF — malware analysis report

Static analysis result for SHA-256 1665be18035582df…

MALICIOUS

PDF

70.6 KB Created: 2021-03-16 07:11:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2ffc05fea51d3d8ef610ea0e306f354a SHA-1: 58af273c6cfa7beece57e5269f2bd167719c2d4e SHA-256: 1665be18035582df1c6197e46695c1d4c53db7943129f2ce58a12bf2df87f6af
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://bologen.ru/strik?utm_term=maplestory+sub+weapons PDF link annotation
    • https://cdn.sqhk.co/fiduzosi/c6iO2Ne/kezanevakep.pdfIn PDF document text
    • http://iranianvc.com/jilugasit8c4ja.pdfIn PDF document text
    • http://the-glow.ru/levizifapusosoliwizoful67kgi.pdfIn PDF document text
    • http://copyrighthelpptteam.com/how_to_view_my_verizon_cloud2de2b.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/56270630206ikktu.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/how_did_the_enlightenment_influence_absolutism.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/motiwajexilazoxulitibope.pdfIn PDF document text
    • http://bunnygummy.ru/91077762767ihtsp.pdfIn PDF document text
    • http://myimperfectmomlife.com/how_to_carve_bone_in_prime_ribeircx.pdfIn PDF document text
    • http://business-open.online/jatimebagewixomujwn.pdfIn PDF document text
    • http://maykistore.ru/buxany94fy.pdfIn PDF document text
    • http://50offshop.info/52976245769wavkk.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/hSsxHgj/artillery_sidewinder_x1_calibration_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_faba64890be14846b7b2233ba8c8ec06.pdf?index=trueIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_961c1c8173bd4d9e888978c91a8f5c38.pdf?index=trueIn PDF document text
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_4a7cca7e8502473ab455750fe0b25a7e.pdf?index=trueIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_42f12b2018b24460a68e680a926bc65e.pdf?index=trueIn PDF document text
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_efaeb6bed27948d185390b9833e38cdd.pdf?index=trueIn PDF document text
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_6d884b97db0c488c9b3ced6c39ca159b.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_off0000d811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD811 5152 bytes
SHA-256: 2fa6c44e4b5dbe42d2148d627fb9d3a881b96ddcdd430573e0f63308baa4f65e
font_01_sfnt_off0000e9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C2 10476 bytes
SHA-256: 09a20c3bfc714aa16dda53f7398cb1bb652a5b31d7b7dd6d9d34726c11e1c87a

Open this report in the interactive analyzer, or submit your own file for analysis.