Malicious PDF — malware analysis report

Static analysis result for SHA-256 415e12f483ab7830…

MALICIOUS

PDF

76.9 KB Created: 2021-04-23 12:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7410aa5d8e6504fb46f45a052b5d976e SHA-1: 2afc178580f84e1ab5a53d8bc574ef212a2b8085 SHA-256: 415e12f483ab7830d44a3e6ce29c40e81b61562faafa43dcc0b8bae0c0698b9d
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains and employing UTM parameters, indicative of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/strik?utm_term=g-shock+metal+bezel+watch+gm-110rb-2a PDF link annotation
    • https://bokobuduvi.weebly.com/uploads/1/3/5/3/135347682/2b0ddaaa6dc032a.pdfIn PDF document text
    • https://gofolonuk.weebly.com/uploads/1/3/4/3/134313710/wesogiponibiw.pdfIn PDF document text
    • http://brosbass.com/bade_miyan_chote_miyan_remix_song8vigw.pdfIn PDF document text
    • http://hotsales-com.xyz/options_trading_strategies_for_dummiesknmi9.pdfIn PDF document text
    • https://kivisazof.weebly.com/uploads/1/3/2/6/132696558/sabasuvogebodawa.pdfIn PDF document text
    • https://zawoluzowusemad.weebly.com/uploads/1/3/4/6/134697528/3f869deddbe8d.pdfIn PDF document text
    • https://tolibopajam.weebly.com/uploads/1/3/4/4/134487495/318e3991735b.pdfIn PDF document text
    • http://fineagencyy.com/4633892663178h98.pdfIn PDF document text
    • https://rowopubogapog.weebly.com/uploads/1/3/4/2/134234702/7f4102c3ffd0ee6.pdfIn PDF document text
    • https://linajijokib.weebly.com/uploads/1/3/4/0/134000065/9455548.pdfIn PDF document text
    • https://vatelepetelijul.weebly.com/uploads/1/3/4/7/134765631/787d354c27fb.pdfIn PDF document text
    • http://topchambre.xyz/adobe_2021_release_dateyltup.pdfIn PDF document text
    • https://poxatekegevu.weebly.com/uploads/1/3/4/7/134753674/4017875.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a697f1da-94af-4bdd-98f5-2e57c9da2bd1/33337112988.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/tipos_de_sistemas_operativos_de_telefonos_celulares.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/how_to_replace_knob_on_gas_stove.pdfIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_b87e8b8fdd6649769d1243c6bfcce535.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e1c5786-2166-46db-94d0-2ed0b196fa83/what_to_do_if_wii_game_cannot_be_read.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78a8784c-8a4c-49d7-9a82-561ccdd79cd1/cub_cadet_lt1050_pto_clutch.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/24890649100.pdfIn PDF document text
    • https://09972071-4174-499b-90b1-de3619f59f53.filesusr.com/ugd/d1c05f_202113bb6a944ccd9804271b848273a7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/75795100-60d1-419b-bcd2-69a6ac04198c/how_to_dress_up_for_office.pdfIn PDF document text
    • https://fecd0c08-032d-4b8b-b26c-6108aca7a00f.filesusr.com/ugd/a87c8b_0d228b3928fe4a79b667d0b6dfc2e837.pdf?index=trueIn PDF document text
    • https://2571d5ef-7130-409a-b87d-c3fd18a83f30.filesusr.com/ugd/71fc55_11a2ce31c9f14612a623e8e3d05c5081.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_off0000eb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7C 5948 bytes
SHA-256: 1e7321172dcae37d5206a3c384948cf6d4f53a95f5051e70a00ca71d5bb2709e
font_01_sfnt_off0000ffbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBB 11156 bytes
SHA-256: 9118f4cd67a75c6c2b5f7d3ec4150e83314e8de5af73e82fc278274c3cfaa9ff

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